S-91375A189 8-32 x 3/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating that protects against rust in demanding industrial environments
• Exceptional thread precision with Class 3A fit ensuring reliable, vibration-resistant fastening in critical assemblies
• High-strength durability from alloy steel construction with Rockwell C45 hardness for long-term performance under load
• Secure installation with 5/64" hex drive providing positive torque transmission and reduced tool slippage
• Space-saving design as a headless set screw ideal for applications with limited clearance requirements
• Enhanced gripping power from cup tip design that bites into materials for superior resistance to loosening
• Industry compliance assurance meeting ASME B18.3 specifications and environmental regulations for global applications

Professional Applications & Engineering Value

This 8-32 UNC set screw delivers critical engineering solutions for industrial applications where vibration resistance and space constraints present significant challenges. The black-oxide alloy steel construction provides essential corrosion protection while maintaining the Rockwell C45 hardness required for repeated adjustments without deformation. The Class 3A thread fit ensures precise engagement in UNC coarse threads, making it ideal for securing collars, pulleys, and gears in machinery where right-hand threading is standard. The headless design with 5/64" hex drive allows installation in confined spaces while the cup tip creates positive mechanical locking against rotational forces. These features combine to address common industrial fastening failures while meeting rigorous ASME B18.3 standards for dimensional consistency and performance reliability.

Specification Summary & Compliance

This set screw features precision 8-32 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy and 0.164" thread diameter. Manufactured to ASME B18.3 specifications (ASTM F912) with Rockwell C45 hardness rating. The 3/16" length with right-hand thread direction and cup tip design ensures consistent performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for unrestricted use in industrial applications worldwide.