S-91375A856 3/4"-16 x 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with a cup point design that bites into surfaces for secure, permanent fastening
• Exceptional durability thanks to Rockwell C45 hardness, resisting wear and deformation under heavy loads
• Precise thread engagement with Class 3A fit and UNF fine thread for reliable performance in high-vibration applications
• Easy installation and removal using a standard 3/8" hex key, ideal for confined spaces with its headless design
• High-strength alloy steel construction ensures reliable performance in demanding industrial environments
• Regulatory compliance with RoHS 3 and REACH standards for safe use in global markets
• Standardized manufacturing per ASME B18.3 specifications guarantees consistent quality and interchangeability

Professional Applications & Engineering Value

This alloy steel set screw delivers critical engineering value in applications requiring permanent positioning and torque transmission. The cup point tip creates concentrated pressure to prevent shaft slippage in pulleys, gears, and collars, while the UNF fine thread with Class 3A fit maintains clamping force in high-vibration machinery. Manufactured from high-strength alloy steel and hardened to Rockwell C45, it resists stripping and deformation under repeated adjustment. The headless hex design with 3/8" drive allows flush mounting in space-constrained assemblies, making it ideal for precision equipment, automotive components, and heavy-duty industrial machinery where reliability is paramount.

Specification Summary & Compliance

This set screw features a 3/4"-16 UNF fine thread with Class 3A tolerance for precise fit, right-hand thread direction, and 3/4" length. It meets ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring both mechanical reliability and regulatory acceptance for industrial use.