S-91418A634 3/8"-16 x 2 1/2" ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Exceptional hardness and durability from Rockwell C45 alloy steel construction, preventing deformation under heavy loads
• Precise extended tip design (0.25" diameter) ensures secure component positioning and reduced vibration loosening
• Reliable coarse UNC threading provides faster installation and superior holding power in demanding applications
• Class 2A thread fit tolerance guarantees consistent performance and compatibility with standard mating components
• External square drive design delivers maximum torque transmission and prevents tool slippage during installation
• Full regulatory compliance with ASTM F912, RoHS 3, and REACH standards for safe, environmentally responsible usage

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for industrial assembly challenges. The extended tip configuration (0.094" length) creates positive seating in shaft collars, pulleys, and gears, preventing axial movement in high-vibration environments. The 3/8"-16 UNC coarse thread combined with Class 2A tolerance ensures rapid installation while maintaining precise alignment in machinery, automotive, and heavy equipment applications. The Rockwell C45 hardness provides exceptional resistance to wear and stripping, making it ideal for permanent or semi-permanent fastening where disassembly is infrequent. The corrosion-resistant black-oxide surface treatment extends service life in moderate environmental conditions without compromising dimensional accuracy.

Specification Summary & Compliance

Manufactured to Class 2A thread fit standards with 3/8"-16 UNC coarse threads and right-hand direction. Features include: 2-1/2" length, 3/8" square head, external square drive, and extended tip (0.25" diameter with ±0.005" length tolerance). Full compliance with ASTM F912 specifications, RoHS 3 (2015/863/EU), and REACH (EC 1907/2006) environmental regulations.