S-90402A149 6-32 x 7/16" ASME B18.13 Steel Pan Head Phillips Screws with External-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior corrosion protection with zinc-plated steel construction for extended service life in demanding environments
• Exceptional vibration resistance through integrated external-tooth lock washer that maintains secure fastening under dynamic loads
• High-strength performance with 60,000 psi tensile strength and Rockwell B69 hardness for reliable load-bearing capability
• Easy installation and removal with Phillips No. 2 drive and standard pan head design for efficient assembly operations
• Optimized thread engagement through coarse UNC threads and Class 2A fit ensuring consistent mating with standard components
• Full-thread coverage along the 7/16" length provides maximum grip and distribution of clamping forces
• Regulatory compliance assurance meeting ASME B18.13 specifications while being RoHS 3 and REACH compliant

Professional Applications & Engineering Value

These zinc-plated steel Phillips pan head screws with external-tooth lock washers deliver critical vibration resistance in industrial assemblies where loosening under dynamic loads poses significant reliability concerns. The combination of coarse UNC 6-32 threads and Class 2A thread fit ensures rapid installation while maintaining precise tolerances for consistent performance across production runs. The integrated external-tooth lock washer bites into both the screw head and mating surface, creating a mechanical lock that outperforms standard fasteners in applications subject to constant vibration, thermal cycling, or mechanical stress. With 60,000 psi tensile strength and complete zinc-plated steel construction, these rounded head screws provide durable fastening solutions for machinery, electrical enclosures, automotive components, and industrial equipment where long-term reliability is paramount.

Specification Summary & Compliance

This 6-32 x 7/16" screw features Class 2A thread fit with coarse UNC threads and right-hand threading direction. Manufactured to ASME B18.13 specifications with Rockwell B69 hardness and 60,000 psi tensile strength. The assembly includes an integrated external-tooth lock washer (0.285" OD, 0.02" thickness) manufactured from zinc-plated steel. Product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.