How Can You Ensure Vibration-Resistant Fastening in High-Stress Automotive Applications?

Our Grade 8.8 internal hex head screws with blue nylok coating (90°~180°) provide exceptional thread-locking performance that prevents loosening under constant vibration and thermal cycling. The trivalent chromium zinc plating offers superior corrosion protection while meeting automotive environmental standards. With complete coating and nylok inspection reports, we guarantee consistent performance for your critical assembly requirements. Contact us for custom specifications and salt spray test data specific to your application.

Our comprehensive quality control process employs professional inspection tools including calipers, protrusion-height gauges, micrometers, and 2.5D/2D projectors to verify critical measurement points: head diameter, head height, hex depth, hex plug gauge compatibility, minor diameter, thread angle, pitch accuracy, coating integrity, and nylok application. Complete coating reports and nylok reports are provided to ensure full traceability and compliance with industry standards. With 45 years of fastener manufacturing expertise and over 10,000 product variations, we deliver customized solutions backed by salt spray testing and advanced surface treatment capabilities for OEM manufacturers requiring high-performance fastening systems.