S-91375A841 1/4"-20 x 3/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with cup point tip design that bites into materials for secure, permanent fastening
• Precise Class 3A thread fit ensures tight tolerances and reliable performance in demanding applications
• Hex headless design allows for flush installation and maximum space efficiency in confined areas
• Enhanced corrosion resistance through zinc plating on alloy steel substrate for extended service life
• High strength durability with Rockwell C45 hardness rating that withstands heavy loads and vibration
• Easy installation and removal using standard 1/8" hex tools for efficient maintenance operations
• Industry-standard compliance meeting ASME B18.3 specifications for guaranteed quality and reliability

Professional Applications & Engineering Value

This 1/4"-20 UNC set screw delivers exceptional engineering value in industrial applications where secure positioning and vibration resistance are critical. The cup point tip creates permanent indentation in mating surfaces, preventing rotational slippage in pulleys, gears, and collars. Manufactured from zinc plated alloy steel, it provides superior corrosion protection in harsh environments while maintaining Rockwell C45 hardness for repeated adjustment cycles. The hex headless design and Class 3A thread fit ensure precise installation in tight spaces with minimal protrusion, making it ideal for machinery, automotive, and manufacturing equipment where reliability cannot be compromised.

Specification Summary & Compliance

This set screw features 1/4"-20 UNC coarse threads with Class 3A thread fit for precision manufacturing tolerances. The product meets ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Manufactured from alloy steel with zinc plating surface treatment, it maintains dimensional stability and corrosion resistance across industrial applications.