S-91375A609 5/16"-24 x 2 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through black-oxide coating, extending service life in demanding industrial environments
• Superior thread engagement with Class 3A precision fit, ensuring reliable fastening and vibration resistance
• High-strength performance from Rockwell C45 hardened alloy steel, preventing deformation under heavy loads
• Secure installation with 5/32" hex drive design, providing excellent torque transmission without head protrusion
• Precise component positioning through cup tip design, creating consistent clamping force on shafts and axles
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial applications
• Fine thread advantage with 5/16"-24 UNF specification, offering improved adjustment precision and load distribution

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in precision assembly applications where vibration resistance and corrosion protection are critical. The Class 3A thread fit ensures minimal backlash in high-precision machinery, while the headless design allows for flush mounting in confined spaces. The cup tip configuration provides superior gripping action on rotating components, preventing slippage in power transmission systems. Engineered for industrial set screw applications requiring Rockwell C45 hardness, this fastener maintains dimensional stability under continuous stress, making it ideal for manufacturing equipment, automotive assemblies, and heavy machinery where UNF fine threads ensure precise axial positioning and reliable long-term performance.

Specification Summary & Compliance

This set screw features 5/16"-24 UNF fine threads with Class 3A precision tolerance for exacting fit requirements. Manufacturing complies with ASME B18.3 specifications (ASTM F912) ensuring dimensional consistency. The product meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) compliance for chemical safety regulations. With 2-1/4" length and right-hand thread direction, this fastener delivers reliable performance in accordance with industrial standards for quality and environmental responsibility.