S-91381A365 3/8"-24 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior anti-loosening performance with Class 3A thread fit ensuring precise, vibration-resistant connections in demanding applications
• Enhanced component protection through brass soft tip design that prevents surface damage to expensive shafts and components
• Exceptional corrosion resistance from black-oxide coating on alloy steel, extending service life in industrial environments
• Optimized torque transmission via 3/16" hex drive that prevents tool slippage and ensures consistent installation force
• Reliable fine thread engagement with 3/8"-24 UNF specification providing maximum clamping force in limited space applications
• Consistent mechanical performance guaranteed by Rockwell C28 hardness rating for dependable strength across production runs
• Simplified regulatory compliance with built-in adherence to ASME B18.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for precision assembly challenges. The UNF fine thread configuration with Class 3A tolerance ensures zero-backlash positioning in machinery, automotive, and aerospace components where vibration resistance is paramount. The integrated brass soft tip eliminates galling and surface damage on expensive shafts while maintaining superior clamping force. Engineered for hex drive installation, this headless design provides flush mounting in confined spaces without compromising torque capability. The combination of Rockwell C28 hardness and corrosion-resistant coating makes it ideal for both indoor and outdoor industrial applications requiring long-term reliability under varying environmental conditions.

Specification Summary & Compliance

This precision fastener maintains Class 3A thread fit per UNF standards with exact 3/8"-24 fine thread spacing. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. Material certification includes alloy steel composition with black-oxide surface treatment and brass tip construction meeting specified hardness and dimensional tolerances.