S-90401A148 6-32 x 1/2" Hex Head Screws with Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance with integrated external-tooth lock washers that maintain tight connections in high-motion environments
• High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for demanding industrial applications
• Enhanced corrosion protection through zinc-plated steel construction, extending service life in harsh conditions
• Quick and reliable installation with standard external hex drive and fully threaded UNC coarse pattern design
• Precise thread engagement with Class 2A thread fit ensuring consistent fastening accuracy
• Secure locking action from the 0.285" OD lock washer that prevents loosening under dynamic loads
• Compliance with international standards including RoHS 3 and REACH for safe industrial usage

Professional Applications & Engineering Value

These zinc-plated steel hex head screws with external-tooth lock washers deliver critical vibration resistance in machinery, automotive assemblies, and electrical enclosures where constant motion threatens fastener integrity. The UNC coarse thread design enables rapid installation in various materials while the fully threaded configuration maximizes pull-out strength. Engineered with 60,000 psi tensile strength, these industrial screws maintain clamping force under extreme loads, preventing costly downtime in production environments. The combination of zinc plating and lock washer technology addresses both corrosion and loosening concerns in demanding applications.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with UNC coarse thread specifications (6-32 size, 0.138" diameter). Features external-tooth lock washers (0.285" OD, 0.022" thickness) integrated with zinc-plated steel construction. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and industrial standards.