S-91381A669 1/2"-13 x 1" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide finish, extending service life in harsh industrial environments
• Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash in critical assemblies
• Non-marring brass tip protects sensitive surfaces while maintaining strong clamping force
• High-strength alloy steel construction with Rockwell C28 hardness provides reliable, long-term holding power
• 1/4" hex drive compatibility allows for standard tooling and efficient installation in confined spaces
• Coarse UNC threading enables quick assembly and reduced cross-threading risks in production lines
• Full regulatory compliance with ASME B18.3, RoHS, and REACH standards for global supply chain integration

Professional Applications & Engineering Value

Engineered for demanding industrial set screw applications, this black-oxide alloy steel component combines material strength with precision manufacturing to address common assembly challenges. The 1/2"-13 UNC coarse thread with Class 3A fit delivers consistent engagement in pulleys, gears, and collars, while the brass tip prevents damage to shafts and rotating components. Ideal for heavy-duty fasteners in machinery, automotive, and manufacturing equipment, its headless design and right-hand thread configuration facilitate flush mounting in space-constrained assemblies. The Rockwell C28 hardness ensures deformation resistance under vibration, making it a reliable choice for permanent positioning applications.

Specification Summary & Compliance

This set screw maintains Class 3A thread tolerances per UNC standards with a 1/2"-13 thread size and 1" length. Manufacturing adheres to ASME B18.3 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability in industrial supply chains.