S-91375A634 3/8"-16 x 2 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide finish for prolonged service life in demanding environments
• Superior holding strength from Rockwell C45 hardened alloy steel construction preventing deformation under high stress
• Precise thread engagement with Class 3A UNC coarse threads ensuring reliable fastening and vibration resistance
• Secure installation torque via 3/16" hex drive design allowing high tightening force without head protrusion
• Maximum surface grip through cup tip configuration that bites into shafts for permanent component positioning
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental directives (RoHS 3, REACH)
• Optimized for industrial duty with 2-1/2" length providing deep penetration for heavy machinery applications

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical solutions for industrial assembly challenges where component slippage causes equipment failure. The Rockwell C45 hardness rating maintains structural integrity under repetitive vibrational loads, while the UNC coarse thread profile enables rapid installation in high-volume production environments. The headless hex drive design permits flush mounting in confined spaces, and the cup tip creates permanent dimples in shafts for zero-movement fastening. Ideal for securing gears, pulleys, and collars in automotive, manufacturing, and heavy equipment applications requiring precision set screws with verified ASME B18.3 compliance.

Specification Summary & Compliance

Manufactured to Class 3A thread fit tolerances for superior dimensional accuracy with 3/8"-16 UNC coarse threads. Full compliance with ASME B18.3 mechanical specifications and material standards per ASTM F912. Environmentally certified per RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. Right-hand thread direction with 0.375" thread diameter and 2-1/2" length.