S-90401A146 6-32 x 3/8" Hex Head Screws with Lock Washer

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated steel construction, ensuring long-term durability in harsh industrial environments
• Superior vibration resistance thanks to the integrated external-tooth lock washer that prevents loosening under dynamic loads
• High tensile strength of 60,000 psi provides reliable fastening performance for demanding applications
• Rockwell B70 hardness maintains structural integrity and prevents deformation during installation
• Quick and easy installation with external hex drive design and coarse UNC threading
• Precise Class 2A thread fit ensures smooth assembly and consistent engagement
• Full threading along the entire 3/8" length maximizes grip and load distribution

Professional Applications & Engineering Value

These zinc-plated steel hex head screws with external-tooth lock washers are engineered to solve critical industrial fastening challenges. The combination of UNC coarse threading and Class 2A fit provides rapid installation while maintaining precise alignment in assembly operations. The fully threaded design ensures maximum thread engagement across the entire fastener length, distributing stress evenly and preventing point loading failures. The integrated lock washer system effectively counters vibration-induced loosening in machinery, automotive components, and electrical enclosures where constant motion threatens fastener integrity. The zinc plating creates a protective barrier against corrosion, making these screws ideal for outdoor equipment, marine applications, and manufacturing facilities where moisture and chemical exposure are concerns.

Specification Summary & Compliance

This 6-32 x 3/8" hex head screw features UNC coarse thread with Class 2A thread fit precision, ensuring consistent dimensional accuracy across production batches. Manufactured from high-grade steel with Rockwell B70 hardness and 60,000 psi tensile strength, these fasteners meet rigorous industrial standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no restricted substances and meeting environmental safety requirements for global industrial applications.