S-91385A165 3/8"-16 x 2 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with integrated Nylon patch thread locker that maintains secure fastening even under extreme conditions from -50°F to 250°F
• Superior material strength through Black-Oxide Alloy Steel construction with Rockwell C45 hardness for exceptional durability and corrosion resistance
• Precise thread engagement with UNC Class 3A coarse threading ensuring reliable installation and maximum holding power in demanding applications
• Optimized torque transmission via hex drive design allowing for high installation torque without head protrusion in space-constrained assemblies
• Enhanced grip and positioning through cup tip design that provides concentrated contact pressure for superior component security
• Industry-standard compliance meeting ASME B18.3 and ASTM F912 specifications for guaranteed performance in critical applications
• Environmental responsibility with RoHS 3 and REACH compliance ensuring safe use across global industrial markets

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel set screw delivers exceptional engineering value in applications where vibration resistance and permanent positioning are critical. The Nylon patch thread locking technology eliminates the need for secondary locking components while providing reliable fastening across extreme temperature ranges from -50°F to 250°F. The UNC Class 3A coarse threading ensures rapid installation and maximum thread engagement in softer materials, while the hex drive configuration allows for high torque application in confined spaces. Particularly valuable in industrial machinery, automotive assemblies, and precision equipment, this set screw's cup tip design concentrates clamping force for secure component positioning without slippage, making it ideal for permanent shaft collars, gear positioning, and pulley installations where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to precise Class 3A thread fit standards with UNC coarse threading (3/8"-16) ensuring optimal engagement and holding power. Complies with ASME B18.3 dimensional specifications and ASTM F912 material requirements. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features 2-1/2" length with 3/16" hex drive for standardized installation tools. The Black-Oxide surface treatment provides corrosion resistance while maintaining dimensional integrity across the specified temperature range.