S-91385A155 10-32 x 1/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with integrated nylon patch thread locker that eliminates the need for separate locking hardware
• Superior corrosion protection from the black-oxide finish on alloy steel, extending service life in demanding environments
• Exceptional thread engagement with Class 3A fit UNF fine threads, providing precise, secure fastening in high-vibration applications
• High-strength performance backed by Rockwell C45 hardness, ensuring reliable holding power under heavy loads
• Wide temperature tolerance from -50°F to 250°F, maintaining locking integrity in extreme thermal conditions
• Secure, flush installation with headless design and cup point tip that bites into surfaces for positive positioning
• Easy installation and removal using a standard 3/32" hex key, streamlining maintenance and assembly processes

Professional Applications & Engineering Value

This 10-32 UNF Class 3A set screw delivers critical vibration resistance for industrial machinery, automotive components, and precision equipment where loosening under dynamic loads poses significant failure risks. The black-oxide alloy steel construction provides durable corrosion resistance while the permanent nylon patch thread locker creates a chemical bond that maintains clamping force without requiring additional lock washers or adhesives. The cup point design generates superior bite into shaft surfaces, preventing axial movement in pulley systems, gear assemblies, and coupling applications. Engineered with fine thread spacing and right-hand threading, it ensures maximum engagement in tapped holes while the headless configuration allows flush mounting in space-constrained designs. This combination of features solves common engineering challenges related to component slippage, maintenance frequency, and assembly reliability in demanding operational environments.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision UNF threading. The screw features a 10-32 thread size with fine thread spacing and right-hand direction. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The component meets ASTM F912 specifications through the ASME B18.3 standard, guaranteeing consistent quality and performance in industrial applications.