S-92991A116 8-32 x 3/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from brass construction, ideal for humid or chemical environments
• Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash
• Easy installation and removal with 5/64" hex drive design, reducing tool slippage
• Excellent holding power from cup tip design that bites into surfaces without loosening
• Enhanced durability with Rockwell B55 hardness, maintaining thread integrity under repeated use
• Reliable coarse threading (UNC) for quick assembly and reduced cross-threading risks
• Headless design allows flush mounting in space-constrained applications

Professional Applications & Engineering Value

This 8-32 UNC brass set screw delivers exceptional performance in demanding industrial settings where corrosion resistance and precision are critical. The Class 3A thread fit provides superior engagement in components requiring vibration resistance, while the cup tip securely locks shafts, pulleys, and knobs without damaging surfaces. Made from brass, it prevents galvanic corrosion when used with dissimilar metals and maintains conductivity in electrical assemblies. The hex drive ensures high torque transmission during installation, reducing stripping risks. Ideal for machinery, automotive, and marine applications, this headless screw offers reliable fastening where protruding hardware isn't feasible.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with 8-32 UNC coarse threads and Class 3A tolerance for precise fit. The screw features a 3/4" length, right-hand thread direction, and Rockwell B55 hardness. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial reliability.