S-91375A177 8-32 x 1 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit ensuring precise, vibration-resistant fastening in demanding applications
• Enhanced corrosion resistance from black-oxide coating on alloy steel, extending service life in harsh industrial environments
• High-strength durability with Rockwell C45 hardness, providing reliable performance under heavy loads and repeated adjustments
• Secure installation via 5/64" hex drive and headless design, allowing flush mounting and preventing tampering
• Optimized grip with cup tip design, distributing pressure evenly to minimize component damage during tightening
• Industry-standard compatibility with 8-32 UNC coarse threads, ensuring easy replacement and broad application use
• Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, globally accepted industrial use

Professional Applications & Engineering Value

This 8-32 UNC set screw delivers critical engineering solutions for industrial assemblies requiring secure shaft positioning and component alignment. The black-oxide alloy steel construction combats rust and wear in humid or abrasive settings, while the Class 3A thread fit eliminates backlash in precision machinery. Its headless hex drive design enables compact installations in confined spaces, and the cup tip securely engages surfaces without marring critical parts. Ideal for securing gears, pulleys, and collars in automotive, manufacturing, and aerospace applications, this screw ensures long-term reliability under dynamic loads and thermal cycling.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with 8-32 UNC coarse threads and Class 3A tolerance for consistent fit. The screw features a 1-1/2" length, 0.164" thread diameter, and right-hand thread direction. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations is verified, ensuring safe use in regulated industries.