S-91375A720 1/2"-13 x 2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for precise, vibration-resistant assemblies
• Enhanced corrosion resistance from black-oxide coating, extending service life in demanding environments
• High-strength durability from alloy steel with Rockwell C45 hardness, resisting deformation under heavy loads
• Secure, flush installation with headless hex drive design, ideal for confined spaces
• Reliable engagement with cup tip for concentrated gripping force on shafts and collars
• Broad industrial compatibility with 1/2"-13 UNC coarse threads, simplifying sourcing and replacement
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional performance in high-stress mechanical systems. Its Class 3A thread fit ensures minimal backlash and superior vibration resistance, critical for pulleys, gears, and coupling applications. The headless hex drive allows flush mounting where clearance is limited, while the cup tip concentrates clamping force to prevent slippage on rotating components. Manufactured to ASME B18.3 specifications with Rockwell C45 hardness, it withstands repetitive torque and environmental exposure, reducing maintenance frequency in industrial machinery, automotive assemblies, and heavy equipment.

Specification Summary & Compliance

This 1/2"-13 UNC coarse thread set screw maintains Class 3A dimensional accuracy per ASME B18.3 (ASTM F912). It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. The right-hand thread direction and 2" length provide standardized installation across compatible assemblies.