S-91375A524 1 1/8"-7 x 1" 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 performance from alloy steel construction with Rockwell C45 hardness for maximum durability under heavy loads
• Easy installation and removal with 9/16" hex drive design providing secure tool engagement without head protrusion
• Enhanced gripping power through cup tip configuration that creates positive seating and prevents component slippage
• Optimized for coarse-thread applications with 1 1/8"-7 UNC thread pattern delivering rapid assembly in softer materials
• Right-hand threading compatibility for standard industrial equipment and maintenance procedures

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications requiring high-strength fastening with precision thread engagement. The Class 3A thread fit provides superior dimensional accuracy that eliminates play in rotating assemblies, preventing costly downtime from vibration-induced loosening. The cup tip design creates concentrated pressure points that securely lock components onto shafts and spindles without damaging surfaces. Engineered with Rockwell C45 hardness, this fastener maintains structural integrity under extreme torque conditions while the black-oxide surface treatment offers reliable corrosion protection in manufacturing environments. Ideal for permanent positioning in machinery, power transmission systems, and heavy equipment where headless fasteners are specified for space-constrained applications.

Specification Summary & Compliance

This precision set screw features 1 1/8"-7 UNC coarse threads with Class 3A thread fit for exacting dimensional tolerances. Manufactured to ASME B18.3 specifications and compliant with ASTM F912 material standards. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring suitability for regulated industrial applications worldwide.