S-91375A883 5/16"-18 x 5/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with cup point design that bites into materials for secure, permanent fastening
• Exceptional corrosion resistance through zinc plating that protects against rust in demanding industrial environments
• Precise Class 3A thread fit ensures tight tolerances and reliable performance in critical applications
• High-strength construction with Rockwell C45 hardness alloy steel for maximum durability under heavy loads
• Easy installation and removal with 5/32" hex drive that provides excellent torque transmission
• Space-saving headless design allows for flush mounting where protruding fasteners aren't feasible
• Industry-standard compliance meeting ASME B18.3 specifications for guaranteed quality and performance

Professional Applications & Engineering Value

This 5/16"-18 UNC Class 3A set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and permanent positioning are critical. The zinc plated alloy steel construction provides superior corrosion protection while maintaining the Rockwell C45 hardness needed for high-strength requirements. The cup point design creates deep indentation in mating surfaces, preventing slippage in pulleys, gears, and collars. The headless configuration with hex drive allows for installation in confined spaces while providing positive torque application. Ideal for precision machinery, automotive components, and manufacturing equipment where coarse thread spacing ensures quick assembly and disassembly without compromising holding strength.

Specification Summary & Compliance

This set screw features 5/16"-18 UNC coarse threads with precision Class 3A thread fit for superior engagement and load distribution. Manufactured to ASME B18.3 specifications with Rockwell C45 hardness rating, ensuring consistent performance in high-stress applications. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety standards. With right-hand thread direction and 5/32" hex drive size, this fastener delivers reliable performance in inch-system applications requiring exact dimensional accuracy.