S-91375A607 5/16"-24 x 1 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating for extended service life in harsh industrial environments
• Precise thread engagement with Class 3A fit ensures reliable, vibration-resistant fastening in critical applications
• High-strength performance backed by Rockwell C45 hardness rating for demanding mechanical assemblies
• Space-saving headless design allows flush mounting where clearance is limited
• Secure installation with 5/32" hex drive providing positive torque control during tightening
• Enhanced grip capability with cup tip design that bites into shaft materials without slipping
• Industry-standard compatibility with UNF fine threads (5/16"-24) for precise adjustment applications

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in applications requiring precise component positioning and vibration resistance. The Class 3A thread fit provides tighter tolerances than standard fasteners, eliminating play in precision machinery, automotive components, and industrial equipment. The UNF fine threads offer superior adjustment accuracy compared to coarse threads, making them ideal for calibration devices and precision instruments. The headless configuration solves space constraint issues in compact assemblies while the cup tip design creates permanent seating marks on shafts, preventing rotational slippage under dynamic loads. The black-oxide surface treatment provides corrosion protection without significantly increasing dimensions, maintaining clearances in tight-tolerance applications.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit precision tolerances for superior engagement. The 5/16"-24 UNF fine threads maintain consistent pitch accuracy while the 1-3/4" length provides ample engagement depth. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across global markets. The Rockwell C45 hardness rating confirms material integrity meets industrial strength requirements for reliable performance in demanding applications.