S-91375A707 1/2"-13 x 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Exceptional thread precision with Class 3A fit ensuring reliable, vibration-resistant fastening in critical assemblies
• High-strength performance from alloy steel with Rockwell C45 hardness for heavy-duty applications
• Secure installation via 1/4" hex drive providing positive torque transmission without head protrusion
• Optimized grip with cup tip design concentrating contact pressure for superior component retention
• Industry-standard compatibility with 1/2"-13 UNC coarse threads simplifying replacement and maintenance
• Regulatory compliance meeting ASME B18.3 specifications with RoHS 3 and REACH environmental standards

Professional Applications & Engineering Value

Engineered for precision positioning and permanent component fixation, this black-oxide alloy steel set screw solves critical alignment challenges in power transmission systems, machinery manufacturing, and automotive assemblies. The headless hex drive design enables flush mounting in confined spaces while maintaining high torque capability. Its Class 3A thread fit and coarse UNC threading provide exceptional resistance to vibrational loosening, making it ideal for high-stress applications. The cup tip configuration creates concentrated clamping force that prevents shaft slippage in pulley, gear, and coupling installations. Combined with corrosion-resistant surface treatment, this fastener delivers long-term reliability in demanding industrial environments where dimensional stability and chemical resistance are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with 1/2"-13 UNC coarse threads maintaining Class 3A dimensional tolerance for precision fit. The right-hand thread direction and 0.5" thread diameter ensure standard compatibility across industrial applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, alongside material certification to ASTM F912 standards for consistent quality and performance verification.