OEM/ODM FACTORY Est. 2008 · 38,000㎡ Plant · ISO 9001 & IATF 16949
RFQ: [email protected] · Tel/WA: +86 135 9922 0505
METROLOGY & COMPLIANCE RIGOR

Certified Quality Laboratory & Zero-Defect Metrology

Zero-defect quality governance under ISO 9001:2015 & IATF 16949 standards. All production lots accompanied by original EN 10204 3.1 Material Test Reports (MTR), Zeiss 3D CMM full-dimension inspection records, and ASTM B117 salt spray endurance certificates.

ISO 9001 & IATF
Automotive Quality Management Certified
±0.002mm
Zeiss 3D CMM Measuring Accuracy
1,500h+
ASTM B117 Accelerated Salt Fog Testing
<20 PPM
Optical High-Speed Sorting Defect Target
ZERO-DEFECT GOVERNANCE

5-Tier Comprehensive Quality Gate Protocols

From raw alloy ingot spectroscopy to in-line statistical process control (Cpk ≥ 1.67) and hermetic VCI packaging audits, every manufacturing milestone is gated by calibrated instruments.

GATE 1

Raw Material IQC & Spectroscopy

Direct spark emission spectrometry verifying chemical alloying elements (Cr, Ni, Mo, Ti, C) against mill heat numbers before bar stock enters machining bays.

GATE 2

First Article Inspection (FAI)

100% CMM tactile probe measurement of initial machined parts. 24-point GD&T balloon drawing verification and tool offset compensation prior to volume production sign-off.

GATE 3

In-Process SPC (Cpk ≥ 1.67)

Automated hourly statistical sampling monitoring key dimensions. Real-time SPC X-bar/R control charts triggering immediate machine stop upon any statistical drift.

GATE 4

100% Telecentric Optical Sort

Multi-camera 360° rotary glass disk optical sorting inspecting 1,200 parts/min for thread pitch damages, head burrs, foreign materials, and mixed metallurgy at <20 PPM.

GATE 5

OQC & VCI Packaging Audit

Pre-shipment packaging integrity check: desiccated VCI rust-inhibitor sealing, barcoded carton heat lot labeling, and complete EN 10204 3.1 documentation inclusion.

LABORATORY EQUIPMENT

Calibrated Laboratory Metrology Portfolio

Our in-house metrology center is temperature and humidity controlled (20±0.5°C, 45% RH) to eliminate thermal drift during micro-tolerance verification.

1. Zeiss Prismo & Contura 3D CMM

Equipped with tactile scanning probes and laser triangulation sensors with measuring accuracy down to 0.9 μm + L/350. Full GD&T true position, concentricity, perpendicularity, and profile contour verification.

Standard: ISO 10360 / ASME Y14.5M
2. ASTM B117 Cyclic Salt Spray Rig

Dual cyclic corrosion test chambers maintaining 5% ± 1% NaCl salt fog at 35°C ± 2°C. Continuous testing capability for 720 to 1,500 hours without red rust on Dacromet, nickel-zinc, and PVD titanium finishes.

Standard: ASTM B117 / ISO 9227
3. Universal Tensile & Proof Load

300 kN computer-controlled electro-hydraulic universal testing machine for axial tensile strength, yield strength, wedge tensile testing, and shear load validation on Class 8.8, 10.9, and 12.9 fasteners.

Standard: ISO 898-1 / ASTM F606
4. Micro-Vickers & Rockwell Hardness

Automated motorized stage Vickers microhardness tester (HV 0.1 - HV 10) for evaluating carburized case depth, nitriding compound layers, and core hardness transition curves.

Standard: ISO 6507 / ASTM E384
5. Hydrogen Embrittlement Verification

Sustained load testing at 75% ultimate tensile load for 48 hours in accordance with ISO 15330 to verify complete de-hydrogenation following post-electroplating 200°C baking ovens.

Standard: ISO 15330 / ASTM F519
6. High-Speed Optical Sorters

12 glass disk optical sorting machines featuring 6 telecentric CCD cameras running at 1,200 parts/minute to detect pitch anomalies, head cracks, foreign materials, and mixed screws at <20 PPM.

Quality Level: Automotive PPM Benchmark
CERTIFIED TOLERANCE LIMITS & TEST CONDITIONS

Manufacturing Process Metrology Matrix

Clear boundaries of achievable micro-tolerances, testing rigs, and verification standards by hardware category.

Hardware Category Standard Tolerance Achievable Precision Primary Test Rig Verification Deliverables
5-Axis CNC Machining ±0.01 mm ±0.003 mm Zeiss Prismo CMM (Tactile / Laser) 3D Inspection Report, GD&T Balloon Drawing
Precision Fasteners & Bolts ISO 4759-1 Grade A Thread 6g / 6H tight fit Keyence Optical Sorting & Thread Gauges EN 10204 3.1 MTR, Proof Load & Torque Test
Progressive Die Stamping ±0.025 mm ±0.005 mm (Fine Blanking) Mitutoyo 2.5D Optical Profile Projector Burr Height Profile, Spring-back Calibration
Aluminum/Zinc Die-Casting ISO 8062-3 DGS 4 ±0.015 mm (CNC Secondary) X-Ray Defect Radiography & He Sniffer Porosity Evaluation (ASTM E505), Leak Test
Anti-Corrosion Surface Finishing 480h Salt Spray 1,500h ASTM B117 (Dacromet) Q-Fog CCT Cyclic Salt Fog Chamber Salt Spray Certificate, XRF Coating Thickness
ACCREDITED DOCUMENTATION

Request Certified Quality Audit Kit & MTR Samples

Evaluate our inspection rigor before production tooling. Request an accredited inspection package including full CMM GD&T balloon reports, EN 10204 3.1 material certificates, and 1,000h salt spray coupons.

100% Free MTR Sample Documentation & PPAP Level 3 Pack
  • Original Mill Heat Chemistry & Mechanical Proof Load Charts
  • Zeiss CMM 3D Coordinate Point Cloud & True Position Reports
  • ISO 15330 48-Hour Sustained Load Hydrogen Baking Logs
  • All inquiries delivered directly to [email protected]

Request Quality Documentation & Certified Part Samples

Provide your technical specifications for direct dispatch by our quality assurance director.

Drag & drop test blueprint here, or browse file
Supported: PDF, STEP, DWG, DXF, ZIP, RAR (Directly delivered to [email protected])