S-91410A958 1"-8 x 3" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with coarse UNC threads designed for maximum resistance to loosening in high-vibration applications
• Exceptional durability provided by steel construction with Rockwell B80 hardness for long-term reliability in demanding environments
• Secure installation enabled by square head design that prevents slipping during high-torque external square drive applications
• Precise thread engagement with Class 2A fit ensuring consistent performance and easy assembly in industrial settings
• Enhanced grip capability through cup tip design that creates positive seating and prevents component movement
• Regulatory compliance assurance meeting ASME B18.6.2 specifications for guaranteed dimensional accuracy and performance standards
• Environmental responsibility with full RoHS 3 and REACH compliance for safe use across global industrial markets

Professional Applications & Engineering Value

This 1"-8 UNC coarse thread set screw delivers critical engineering solutions for industrial assembly challenges where vibration resistance and permanent positioning are paramount. The steel construction with Rockwell B80 hardness provides the necessary strength to withstand extreme mechanical stresses in heavy machinery, manufacturing equipment, and automotive applications. The square head design accommodates high-torque installation using standard external square drive tools, ensuring secure fastening without cam-out issues. The cup tip configuration creates concentrated pressure points that bite into mating surfaces, preventing rotational slippage in shaft collars, gears, and pulleys. This combination of coarse threading and premium material properties addresses common failure points in industrial fastening by maintaining clamp force under dynamic loading conditions.

Specification Summary & Compliance

This set screw maintains Class 2A thread fit per UNC standards, ensuring proper clearance for reliable assembly while maintaining dimensional precision. Manufacturing adheres to ASME B18.6.2 specifications governing square head set screws, guaranteeing consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and meets REACH (EC 1907/2006) requirements for chemical safety, making it suitable for international industrial applications with strict regulatory requirements.