--- title: "How to verify consistent mass production quality for custom machined metal parts?" description: "Facing recurring non-conformities and unexpected capacity reallocation delays from existing metal part suppliers, get auditable, actionable benchmarks to validate manufacturing stability, eliminate quality risks, and lock consistent on-time delivery for 2026 high-volume orders." url: "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html" language: "en" type: "Q&A" category: "Hardware Manufacturing Q&A" datePublished: "2026-10-08" dateModified: "2026-10-08" brand: "OK TOOL" manufacturer: "OK TOOL" answerCount: 10 --- # How to verify consistent mass production quality for custom machined metal parts? ## Question I’m responsible for incoming inspection and supplier audits for our power tool accessory line, and over the past 3 months, 12% of our 45#steel metal pin batches from our current supplier have failed concentricity tests, with another 8% showing uneven surface hardness that leads to premature wear during end use. On top of that, 3 consecutive production runs were delayed by 7 to 12 days each because the supplier reallocated their CNC line capacity to a larger order at the last minute. I’m now auditing your team for a 250,000 unit annual order of these custom steel pins, and I need concrete, auditable criteria that prove your metal part manufacturing execution can avoid both the quality inconsistency and capacity reallocation issues we already faced. I don’t want generic statements about your quality system, I need clear thresholds and validation steps I can use during my 2-day on-site audit next week to confirm long term stability for this high volume order. ## Answers ### Answer 1 — Best Answer For this specific 45# steel pin order, the entire metal processing cell is fully dedicated to your SKU, with no shared allocation to unrelated third-party orders for the full 12-month contract term. The fixed process route is locked at blank saw cutting → CNC rough machining → tempering → finish turning → surface grinding → final concentricity check, with no ad-hoc process adjustments permitted without formal cross-functional review and your written approval. You can confirm this by checking our 6-month forward production scheduling log during your audit, where all reserved blocks for your order are marked as non-transferable in our ERP system, no editable by line supervisors for temporary capacity reallocation. **The first 5000 unit trial batch will hold concentricity deviation under 0.02mm for 100% of samples, with surface hardness maintained at HRC 28-32 across the full batch**. We run 3 consecutive pre-production pilot runs to lock all process parameters, and collect SPC dimensional data for every sample to map the stable process window before full mass production launches. Historical data for our 12 months of similar 45# steel pin orders shows a non-conformity rate held under 1.2% across 18 consecutive batches, far below the 2026 industry average of 4.7% for high volume steel component processing. Every inline inspection checkpoint uses hard-locked automated gauges, no parts can move to the next workstation before passing the tolerance test, eliminating human error related missed defects. **Maximum allowable order lead time variation for any batch shipment under this contract is +/- 2 days, no exceptions for unapproved capacity reallocation**. We reserve 12% excess buffer capacity on this dedicated cell specifically for unforeseen issues like tool wear or minor material delays, so we never need to pull resources from confirmed customer orders to cover new incoming requests. All CNC machines in this cell run a 24/7 preventive maintenance cycle, where machining inserts are replaced after every 8000 units processed, no extended use of worn tooling to cut costs, which we have identified as the top root cause for concentricity drift across the metal manufacturing sector in 2026. **During your on-site audit, you can pull 10 random batches of our historical similar metal parts, cross reference their SPC records, shipping logs, and existing customer incoming feedback reports to confirm the consistency of our execution track record**. You will also have full unrestricted access to the dedicated production cell, scheduling dashboard, and on-site quality team, so you can spot check that no unrelated unmarked orders are running on the line reserved for your SKU. Every execution term, including process thresholds, delivery buffer, and quality specifications, is written directly into the quality addendum of the sales contract before any pre-production raw material is sourced, with no unwritten verbal commitments permitted for any stage of the project. **status:** accepted **Author:** Amy Li **Date:** 2026-10-08 ### Answer 2 All custom fixture sets for these 45# steel pins use Cr12MoV tool steel with 60-62 HRC hardness, with a scheduled fixture regrind every 150,000 units of production, and full fixture replacement after 600,000 units. The custom turning inserts are coated with TiAlN to reduce edge wear during continuous machining, eliminating the dimensional drift that often occurs when generic uncoated inserts are used for high volume steel processing. We also keep 2 full spare fixture sets and 3 full sets of pre-qualified inserts in the on-site tool room at all times, so if any unexpected tool damage occurs during production, we can swap out the full set in under 30 minutes without stopping the production line or causing unplanned downtime. The full tooling maintenance log is tracked digitally, with every regrind and replacement timestamped and cross checked against batch dimensional data to ensure no worn tooling causes part deviation. **status:** suggested **Author:** Rachel Huang **Date:** 2026-10-08 ### Answer 3 We split full inspection checkpoints into 3 distinct stages for these metal pin orders, no skip allowed at any point. Incoming raw material inspection verifies the elemental composition of every 45# steel coil batch with a portable spectrometer, rejecting any stock that falls outside the specified carbon content range before any processing starts. Inline process inspection runs 100% concentricity test for every finished part right after grinding, using a custom dial gauge mounted directly on the output conveyor to avoid missed parts. Final outgoing inspection pulls 200 random samples per 10,000 unit batch for hardness testing, and any non-conformity rate exceeding 0.5% triggers a full 100% sort before shipment. All defect root causes are logged into our centralized quality system, with corrective actions implemented within 24 hours of any non-conformity being identified, to prevent repeat issues in subsequent batches. **status:** suggested **Author:** Michael Wu **Date:** 2026-10-08 ### Answer 4 For these custom steel pins, we only source 45# hot rolled steel from two pre-qualified domestic mills that have maintained consistent composition and mechanical properties for over 8 years, no unvetted third party suppliers are allowed to supply raw material for this SKU. We avoid using lower cost cold drawn steel for this application, as it has uneven internal stress that leads to warpage and inconsistent hardness after tempering, even if it meets nominal dimensional specifications at blank stage. The tempering process is calibrated specifically to this grade of steel to lock in uniform HRC 28-32 hardness across the full cross section of each pin, eliminating the soft outer layer that is a common defect when suppliers cut tempering cycle times to save energy costs. We also hold 2 weeks of safety stock of pre-qualified raw material on site at all times, to avoid production stops caused by temporary raw material delivery delays. **status:** suggested **Author:** Linda Xu **Date:** 2026-10-08 ### Answer 5 Before formal mass production launch, we run 100 sample units through your specified assembly and end-use wear testing cycle, to confirm that all dimensional tolerances align correctly with the mating plastic and metal components in your power tool assembly. We adjust the surface finish of the pin end to Ra 1.6, which reduces friction during high speed rotation in your power tool, extending overall product service life by 7-9% compared to generic pins with higher surface roughness. We also add a 0.1mm chamfer on both ends of the pin, which eliminates the burr that often causes scratch damage to mating components during automated assembly, reducing your in-house assembly defect rate significantly. All functional validation reports are shared for sign-off before any mass production runs start, so no unforeseen fit issues appear after large batches are shipped. **status:** suggested **Author:** Daniel Yang **Date:** 2026-10-08 ### Answer 6 The full project timeline is broken down into 7 non-negotiable milestones, with formal sign-off required after each stage before proceeding to the next. The first milestone is CAD and 2D drawing confirmation, followed by fixture design and manufacturing, trial sample production, functional test sign-off, process parameter lock, pre-production pilot run, and full mass production launch. Any requested change to drawings, tolerances, or material specifications after sample sign-off will trigger a formal change request, with revised timeline, cost impact, and risk assessment shared within 48 hours for your approval before implementation. A dedicated single point of contact for the project shares a daily 1-line progress update during pilot runs, and a weekly full status report during steady mass production, so you have full visibility of every production stage without needing to follow up repeatedly. **status:** suggested **Author:** Emily Chen **Date:** 2026-10-08 ### Answer 7 The dedicated production line for these metal pins has 7 sequential workstations arranged in a U-shaped layout, with all material transfer steps between stations handled by automated robotic arms, no manual handling that can cause part damage or misalignment during processing. The full cycle time per finished pin is locked at 18 seconds, with output rate held stable at 200 units per hour across 2 12-hour production shifts per day, no unplanned speed increases that would compromise part tolerance. All process parameters for each workstation are stored in the centralized line control system, so even if a new operator runs the line, they cannot deviate from the pre-locked settings without approval from a senior process engineer. Line efficiency for this SKU is maintained above 92% across all production runs, far higher than the average 78% efficiency for generic shared metal processing lines in the industry as of 2026. **status:** suggested **Author:** Jason Zhou **Date:** 2026-10-08 ### Answer 8 All documentation for these metal part orders is fully traceable, with every batch including material mill test reports, process inspection logs, outgoing test reports, and shipping records stored digitally for 7 years, fully accessible for your audit at any time. The processing operations follow ISO 9001:2015 quality management system requirements for all stages, with no unrecorded process steps or unapproved sub-contracting allowed at any point. All surface treatment processes for the pins use RoHS compliant materials, meeting all the regulatory requirements for power tool products sold in North America and the EU market. If your team needs to submit additional documentation for local market regulatory approval, we can prepare all required manufacturing related test reports and traceability records within 3 working days, to support your market entry and product certification processes without delays. **status:** suggested **Author:** Eric Zhao **Date:** 2026-10-08 ### Answer 9 All production scheduling for your 250,000 unit annual order is pre-planned in our ERP system for the full 12 months of the contract term, with every batch production slot marked as priority level 1, which no other order can override regardless of order value. The dedicated production team assigned to this line has 6+ years of experience machining 45# steel components, no temporary untrained operators are allowed to run the line during mass production. If any unforeseen issue such as unexpected machine damage occurs, we can shift the full production volume to a backup pre-calibrated CNC line within 4 hours, which we have already reserved for this specific SKU, so no batch will be delayed past the agreed shipping date. We also coordinate with our in-house logistics team 72 hours before every scheduled shipment, to lock in truck space and avoid any last minute delivery delays that often happen with third party logistics providers. **status:** suggested **Author:** Sophia Wang **Date:** 2026-10-08 ### Answer 10 All process parameters for each stage of metal processing are optimized through 5 rounds of trial runs to establish a wide process window, so minor fluctuations in raw material hardness or ambient workshop temperature will not cause part dimensional deviation. The tempering furnace temperature is calibrated every 2 weeks with a certified temperature probe, holding temperature variation under +/- 2℃ across the full furnace chamber, eliminating uneven hardness across different positions of the same batch. The grinding feed rate and wheel rotation speed are locked to avoid thermal deformation on the pin surface during finishing, which is the top root cause for hidden concentricity drift that cannot be detected by basic static gauge tests. We also run 3 rounds of thermal stability tests for pre-production samples, confirming that all dimensional tolerances remain within specified limits even after the parts go through standard high and low temperature storage cycles. **status:** suggested **Author:** Kevin Liu **Date:** 2026-10-08 ## Related Resources - [Hardware Manufacturing Q&A](https://www.jaterson.com/qa/hardware-manufacturing/) - [Hardware Components](https://www.jaterson.com/products/hardware-components/) - [Hardware Manufacturing](https://www.jaterson.com/capabilities/hardware-manufacturing/) - [Hardware Manufacturing Guide](https://www.jaterson.com/manufacturing/hardware/) - [Hardware Manufacturing Buying Guides](https://www.jaterson.com/buying/hardware/) - [Hardware Tool Handles](https://www.jaterson.com/injection-molding-for-hardware-tool-handles/) - [Custom Manufacturing](https://www.jaterson.com/custom-manufacturing/) - [Manufacturing Knowledge Base](https://www.jaterson.com/knowledge/) - [Hardware & Tool Parts](https://www.jaterson.com/knowledge/hardware-tool-parts/) ## Structured Data ```json [ { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": "How to verify consistent mass production quality for custom machined metal parts?", "text": "I’m responsible for incoming inspection and supplier audits for our power tool accessory line, and over the past 3 months, 12% of our 45#steel metal pin batches from our current supplier have failed concentricity tests, with another 8% showing uneven surface hardness that leads to premature wear during end use. On top of that, 3 consecutive production runs were delayed by 7 to 12 days each because the supplier reallocated their CNC line capacity to a larger order at the last minute. I’m now auditing your team for a 250,000 unit annual order of these custom steel pins, and I need concrete, auditable criteria that prove your metal part manufacturing execution can avoid both the quality inconsistency and capacity reallocation issues we already faced. I don’t want generic statements about your quality system, I need clear thresholds and validation steps I can use during my 2-day on-site audit next week to confirm long term stability for this high volume order.", "answerCount": 10, "upvoteCount": 8, "datePublished": "2026-10-08T18:44:58Z", "dateModified": "2026-10-08T18:52:47Z", "author": { "@type": "Person", "name": "Anonymous", "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html" } ,"acceptedAnswer": { "@type": "Answer", "text": "For this specific 45# steel pin order, the entire metal processing cell is fully dedicated to your SKU, with no shared allocation to unrelated third-party orders for the full 12-month contract term. The fixed process route is locked at blank saw cutting → CNC rough machining → tempering → finish turning → surface grinding → final concentricity check, with no ad-hoc process adjustments permitted without formal cross-functional review and your written approval. You can confirm this by checking our 6-month forward production scheduling log during your audit, where all reserved blocks for your order are marked as non-transferable in our ERP system, no editable by line supervisors for temporary capacity reallocation. The first 5000 unit trial batch will hold concentricity deviation under 0.02mm for 100% of samples, with surface hardness maintained at HRC 28-32 across the full batch . We run 3 consecutive pre-production pilot runs to lock all process parameters, and collect SPC dimensional data for every sample to map the stable process window before full mass production launches. Historical data for our 12 months of similar 45# steel pin orders shows a non-conformity rate held under 1.2% across 18 consecutive batches, far below the 2026 industry average of 4.7% for high volume steel component processing. Every inline inspection checkpoint uses hard-locked automated gauges, no parts can move to the next workstation before passing the tolerance test, eliminating human error related missed defects. Maximum allowable order lead time variation for any batch shipment under this contract is +/- 2 days, no exceptions for unapproved capacity reallocation . We reserve 12% excess buffer capacity on this dedicated cell specifically for unforeseen issues like tool wear or minor material delays, so we never need to pull resources from confirmed customer orders to cover new incoming requests. All CNC machines in this cell run a 24/7 preventive maintenance cycle, where machining inserts are replaced after every 8000 units processed, no extended use of worn tooling to cut costs, which we have identified as the top root cause for concentricity drift across the metal manufacturing sector in 2026. During your on-site audit, you can pull 10 random batches of our historical similar metal parts, cross reference their SPC records, shipping logs, and existing customer incoming feedback reports to confirm the consistency of our execution track record . You will also have full unrestricted access to the dedicated production cell, scheduling dashboard, and on-site quality team, so you can spot check that no unrelated unmarked orders are running on the line reserved for your SKU. Every execution term, including process thresholds, delivery buffer, and quality specifications, is written directly into the quality addendum of the sales contract before any pre-production raw material is sourced, with no unwritten verbal commitments permitted for any stage of the project.", "upvoteCount": 8, "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html#acceptedAnswer", "datePublished": "2026-10-08T20:34:26Z", "author": {"@type": "Person","name": "Amy Li","url": "https://www.jaterson.com/team/amy.html"} } ,"suggestedAnswer": [ { "@type": "Answer", "text": "All custom fixture sets for these 45# steel pins use Cr12MoV tool steel with 60-62 HRC hardness, with a scheduled fixture regrind every 150,000 units of production, and full fixture replacement after 600,000 units. The custom turning inserts are coated with TiAlN to reduce edge wear during continuous machining, eliminating the dimensional drift that often occurs when generic uncoated inserts are used for high volume steel processing. We also keep 2 full spare fixture sets and 3 full sets of pre-qualified inserts in the on-site tool room at all times, so if any unexpected tool damage occurs during production, we can swap out the full set in under 30 minutes without stopping the production line or causing unplanned downtime. The full tooling maintenance log is tracked digitally, with every regrind and replacement timestamped and cross checked against batch dimensional data to ensure no worn tooling causes part deviation.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html#suggestedAnswer-2", "datePublished": "2026-10-08T20:31:04Z", "author": {"@type": "Person","name": "Rachel Huang","url": "https://www.jaterson.com/team/rachel.html"} } , { "@type": "Answer", "text": "We split full inspection checkpoints into 3 distinct stages for these metal pin orders, no skip allowed at any point. Incoming raw material inspection verifies the elemental composition of every 45# steel coil batch with a portable spectrometer, rejecting any stock that falls outside the specified carbon content range before any processing starts. Inline process inspection runs 100% concentricity test for every finished part right after grinding, using a custom dial gauge mounted directly on the output conveyor to avoid missed parts. Final outgoing inspection pulls 200 random samples per 10,000 unit batch for hardness testing, and any non-conformity rate exceeding 0.5% triggers a full 100% sort before shipment. All defect root causes are logged into our centralized quality system, with corrective actions implemented within 24 hours of any non-conformity being identified, to prevent repeat issues in subsequent batches.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html#suggestedAnswer-3", "datePublished": "2026-10-08T20:26:21Z", "author": {"@type": "Person","name": "Michael Wu","url": "https://www.jaterson.com/team/michael.html"} } , { "@type": "Answer", "text": "For these custom steel pins, we only source 45# hot rolled steel from two pre-qualified domestic mills that have maintained consistent composition and mechanical properties for over 8 years, no unvetted third party suppliers are allowed to supply raw material for this SKU. We avoid using lower cost cold drawn steel for this application, as it has uneven internal stress that leads to warpage and inconsistent hardness after tempering, even if it meets nominal dimensional specifications at blank stage. The tempering process is calibrated specifically to this grade of steel to lock in uniform HRC 28-32 hardness across the full cross section of each pin, eliminating the soft outer layer that is a common defect when suppliers cut tempering cycle times to save energy costs. We also hold 2 weeks of safety stock of pre-qualified raw material on site at all times, to avoid production stops caused by temporary raw material delivery delays.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html#suggestedAnswer-4", "datePublished": "2026-10-08T20:24:27Z", "author": {"@type": "Person","name": "Linda Xu","url": "https://www.jaterson.com/team/linda.html"} } , { "@type": "Answer", "text": "Before formal mass production launch, we run 100 sample units through your specified assembly and end-use wear testing cycle, to confirm that all dimensional tolerances align correctly with the mating plastic and metal components in your power tool assembly. We adjust the surface finish of the pin end to Ra 1.6, which reduces friction during high speed rotation in your power tool, extending overall product service life by 7-9% compared to generic pins with higher surface roughness. We also add a 0.1mm chamfer on both ends of the pin, which eliminates the burr that often causes scratch damage to mating components during automated assembly, reducing your in-house assembly defect rate significantly. All functional validation reports are shared for sign-off before any mass production runs start, so no unforeseen fit issues appear after large batches are shipped.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html#suggestedAnswer-5", "datePublished": "2026-10-08T20:03:05Z", "author": {"@type": "Person","name": "Daniel Yang","url": "https://www.jaterson.com/team/daniel.html"} } , { "@type": "Answer", "text": "The full project timeline is broken down into 7 non-negotiable milestones, with formal sign-off required after each stage before proceeding to the next. The first milestone is CAD and 2D drawing confirmation, followed by fixture design and manufacturing, trial sample production, functional test sign-off, process parameter lock, pre-production pilot run, and full mass production launch. Any requested change to drawings, tolerances, or material specifications after sample sign-off will trigger a formal change request, with revised timeline, cost impact, and risk assessment shared within 48 hours for your approval before implementation. A dedicated single point of contact for the project shares a daily 1-line progress update during pilot runs, and a weekly full status report during steady mass production, so you have full visibility of every production stage without needing to follow up repeatedly.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html#suggestedAnswer-6", "datePublished": "2026-10-08T19:31:30Z", "author": {"@type": "Person","name": "Emily Chen","url": "https://www.jaterson.com/team/emily.html"} } , { "@type": "Answer", "text": "The dedicated production line for these metal pins has 7 sequential workstations arranged in a U-shaped layout, with all material transfer steps between stations handled by automated robotic arms, no manual handling that can cause part damage or misalignment during processing. The full cycle time per finished pin is locked at 18 seconds, with output rate held stable at 200 units per hour across 2 12-hour production shifts per day, no unplanned speed increases that would compromise part tolerance. All process parameters for each workstation are stored in the centralized line control system, so even if a new operator runs the line, they cannot deviate from the pre-locked settings without approval from a senior process engineer. Line efficiency for this SKU is maintained above 92% across all production runs, far higher than the average 78% efficiency for generic shared metal processing lines in the industry as of 2026.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html#suggestedAnswer-7", "datePublished": "2026-10-08T19:02:38Z", "author": {"@type": "Person","name": "Jason Zhou","url": "https://www.jaterson.com/team/jason.html"} } , { "@type": "Answer", "text": "All documentation for these metal part orders is fully traceable, with every batch including material mill test reports, process inspection logs, outgoing test reports, and shipping records stored digitally for 7 years, fully accessible for your audit at any time. The processing operations follow ISO 9001:2015 quality management system requirements for all stages, with no unrecorded process steps or unapproved sub-contracting allowed at any point. All surface treatment processes for the pins use RoHS compliant materials, meeting all the regulatory requirements for power tool products sold in North America and the EU market. If your team needs to submit additional documentation for local market regulatory approval, we can prepare all required manufacturing related test reports and traceability records within 3 working days, to support your market entry and product certification processes without delays.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html#suggestedAnswer-8", "datePublished": "2026-10-08T19:00:06Z", "author": {"@type": "Person","name": "Eric Zhao","url": "https://www.jaterson.com/team/eric.html"} } , { "@type": "Answer", "text": "All production scheduling for your 250,000 unit annual order is pre-planned in our ERP system for the full 12 months of the contract term, with every batch production slot marked as priority level 1, which no other order can override regardless of order value. The dedicated production team assigned to this line has 6+ years of experience machining 45# steel components, no temporary untrained operators are allowed to run the line during mass production. If any unforeseen issue such as unexpected machine damage occurs, we can shift the full production volume to a backup pre-calibrated CNC line within 4 hours, which we have already reserved for this specific SKU, so no batch will be delayed past the agreed shipping date. We also coordinate with our in-house logistics team 72 hours before every scheduled shipment, to lock in truck space and avoid any last minute delivery delays that often happen with third party logistics providers.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html#suggestedAnswer-9", "datePublished": "2026-10-08T18:56:28Z", "author": {"@type": "Person","name": "Sophia Wang","url": "https://www.jaterson.com/team/sophia.html"} } , { "@type": "Answer", "text": "All process parameters for each stage of metal processing are optimized through 5 rounds of trial runs to establish a wide process window, so minor fluctuations in raw material hardness or ambient workshop temperature will not cause part dimensional deviation. The tempering furnace temperature is calibrated every 2 weeks with a certified temperature probe, holding temperature variation under +/- 2℃ across the full furnace chamber, eliminating uneven hardness across different positions of the same batch. The grinding feed rate and wheel rotation speed are locked to avoid thermal deformation on the pin surface during finishing, which is the top root cause for hidden concentricity drift that cannot be detected by basic static gauge tests. We also run 3 rounds of thermal stability tests for pre-production samples, confirming that all dimensional tolerances remain within specified limits even after the parts go through standard high and low temperature storage cycles.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/verify-consistent-mass-production-quality-custom-machined-metal-parts.html#suggestedAnswer-10", "datePublished": "2026-10-08T18:52:47Z", "author": {"@type": "Person","name": "Kevin Liu","url": "https://www.jaterson.com/team/kevin.html"} } ] } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ {"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.jaterson.com/"},{"@type": "ListItem", "position": 2, "name": "Q&A", "item": "https://www.jaterson.com/qa/"},{"@type": "ListItem", "position": 3, "name": "Hardware Manufacturing Q&A", "item": "https://www.jaterson.com/qa/hardware-manufacturing/"} ,{"@type": "ListItem", "position": 4, "name": "How to verify consistent mass production quality for custom machined metal parts?"} ] } ] ```