Zero Defect,
36 years of promise.
IATF 16949 automotive QMS, ISO 14001 environmental management, and Hyundai/Kia SQ A-Grade — Daesung Fastener's quality is verified by international standards.
Quality Policy & Targets
0 PPM outgoing, 50 PPM in-process, 100 PPM incoming. Clear PPM targets at each stage to ensure stable supply to automotive industry standards.
Defect-rate target for finished products shipped to customers. Dual inspection — vision sorting plus jig sorting — drives toward zero-defect shipment.
Defect-rate target across forging, rolling, and post-processing. Process self-inspection and periodic measurement minimize variation.
Defect-rate target on incoming raw materials. Quality is managed from the moment SWCH45F, SCM435, and other materials arrive.
Customer trust begins with quality. Daesung Fastener manages every step — from receiving to shipping — under the IATF 16949 system, with clear PPM targets at each stage.
6 certifications
& government designations.
From global automotive standard IATF 16949 to environmental ISO 14001 and Hyundai/Kia SQ A-Grade — Daesung Fastener's quality is recognized through international and OEM certifications.
IATF 16949 Quality Management System
ISO 14001 Environmental Management System
Hyundai/Kia SQ Certification (A-Grade)
Minister of SMEs Commendation
Root Industry Certification
Materials/Parts/Equipment Specialized Company
Patents & Awards.
A government-recognized smart factory benchmark, plus proprietary registered designs. 36 years of trust — on the record.
Minister of SMEs
Commendation.
Recognized as an industry benchmark for advancing manufacturing through smart factory construction, and for contributing to national economic growth — awarded the Minister of SMEs and Startups Commendation.
Design Registration (2)
Holds registered designs for our proprietary precision-component geometries.
Smart Factory Construction
Government-supported digitalization of manufacturing — real-time monitoring and a data-driven quality system.
Manufacturing &
Test Equipment.
From forging, trimming, and rolling lines to vision sorting, tensile, hardness, and salt-spray testing — every process is operated and verified in-house.
Forging F/M (3 units)
For large-diameter precision forging. Core equipment of the primary processing line.
Forging H/D (12 units)
For medium and small-diameter forging. Workhorse equipment delivering 8.7 million pieces per month.
Trimming T/M (3 units)
Trims bolt heads to final geometry — hex, flange, etc. — immediately after forging.
Rolling R/L (11 units)
Precision thread-rolling equipment. Responsible for dimensional standardization and accuracy.
Precision Machining
Secondary precision processing line. Handles complex geometries.
Tensile Tester
Measures tensile and yield strength of bolts to verify 8.8T to 12.9T grades.
Vickers Hardness
Precision micro-hardness measurement. Accurately verifies hardness changes after surface treatment.
Rockwell Hardness
Standard hardness test for automotive parts. Fast and reliable.
Salt Spray Tester
Verifies corrosion resistance of plated parts via accelerated testing. Used to certify ZnNi and Dacro plating quality.
Plating Thickness Gauge
Precisely measures plating thickness to guarantee customer specifications.
Electron Microscope
Detailed analysis of micro-defects and surface conditions. Used to investigate root causes of non-conformance.
Video Meter
Optical measurement for precision inspection of part dimensions and geometry.
Polishing · Mounting
Grinding and mounting equipment for cross-sectional specimen analysis — used for case-hardening and carburized-layer analysis.
Vision Sorters (2 units)
High-speed optical cameras automatically classify geometric and dimensional non-conformances. Core enabler of 0 PPM outgoing.
Jig Sorters (6 units)
Custom jigs by specification sort non-conforming parts. Strong support for high-mix production.
Need quality documents?
Detailed test reports, certificate copies, and drawings are provided on request. Contact us anytime — quotation inquiries or technical review.