S-91385A338 10-32 x 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated nylon patch thread locker that prevents loosening under dynamic loads
• Exceptional corrosion protection with black-oxide coating on alloy steel for extended service life in harsh environments
• Precise thread engagement with Class 3A UNF fine threads ensuring reliable, tight fits in critical applications
• High-strength performance backed by Rockwell C45 hardness for durable, long-lasting fastening solutions
• Space-saving installation with headless hex drive design ideal for confined spaces and flush mounting requirements
• Wide temperature tolerance with thread locker maintaining effectiveness from -50°F to 250°F for versatile applications
• Secure gripping action through cup point design that bites into mating surfaces for positive locking

Professional Applications & Engineering Value

This 10-32 UNF Class 3A set screw delivers exceptional engineering value in demanding industrial environments where vibration resistance and precise positioning are critical. The black-oxide alloy steel construction provides superior corrosion protection while maintaining the Rockwell C45 hardness needed for repeated adjustments without deformation. The integrated nylon patch thread locker solves common vibration-induced loosening problems in machinery, automotive components, and precision equipment. The headless hex drive design with 3/32" drive size enables installation in tight spaces where conventional fasteners cannot fit, while the cup point tip ensures maximum grip on shafts and collars. These industrial set screws are engineered to maintain clamping force under extreme conditions, making them ideal for permanent assemblies in manufacturing, aerospace, and heavy equipment applications.

Specification Summary & Compliance

This set screw features precision 10-32 UNF Class 3A threads with fine thread spacing and right-hand direction, manufactured to exacting dimensional standards. The product complies with ASME B18.3 specifications and ASTM F912 manufacturing standards, ensuring consistent quality and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances. The thread locker maintains functionality across the specified temperature range of -50°F to 250°F, providing reliable performance in diverse operating conditions.