S-91943A657 1/2"-13 x 1 1/2" Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Permanent swivel tip with 9° maximum angle ensures consistent, even pressure distribution and prevents component damage during tightening
• High-strength alloy steel construction with Rockwell C39 hardness provides excellent wear resistance and reliable long-term fastening
• Precise Class 2A thread fit on 1/2"-13 UNC coarse threads enables quick assembly and secure, vibration-resistant connections
• Headless hex drive design with 1/4" drive allows for flush installation in confined spaces and easy torque application
• Right-hand coarse threading offers faster installation and reduced cross-threading risk in high-volume assembly operations
• Full regulatory compliance with RoHS 3 and REACH standards ensures environmental safety and global market acceptance

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering advantages for industrial applications where vibration resistance, space constraints, and component protection are paramount. The permanent swivel tip with 9° maximum articulation prevents marring and distributes clamping force evenly, making it ideal for securing gears, pulleys, and collars on precision shafts without damaging expensive components. The UNC coarse thread configuration with Class 2A fit ensures rapid installation in production environments while maintaining secure fastening under dynamic loads. The headless hex drive design allows flush mounting in applications where protruding fastener heads would interfere with adjacent components or rotating assemblies. With Rockwell C39 hardness, this set screw maintains its clamping force in high-vibration machinery, automotive systems, and heavy equipment where reliability is non-negotiable.

Specification Summary & Compliance

This set screw features 1/2"-13 UNC coarse threads with Class 2A thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and interchangeability. The 1-1/2" length and 0.5" thread diameter provide optimal engagement for various shaft sizes. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental compliance for industrial and international applications. The permanent swivel tip with 0.29" diameter maintains consistent performance throughout the fastener's service life.