S-91375A560 1/4"-28 x 5/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating for extended service life in harsh industrial environments
• Precise thread engagement with Class 3A UNF fine threads ensuring reliable, vibration-resistant fastening
• Exceptional mechanical strength from alloy steel construction with Rockwell C45 hardness for heavy-duty applications
• Secure installation and removal through 1/8" hex drive design, providing excellent torque transmission
• Optimal component positioning with cup tip configuration that minimizes surface damage during clamping
• Space-saving headless design allowing for flush mounting where clearance is limited
• Industry-standard compliance meeting ASME B18.3 specifications for consistent performance and interchangeability

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for precision machinery and industrial equipment. The Class 3A UNF fine threads provide superior resistance to vibrational loosening in high-stress applications, while the cup tip design ensures secure component positioning without damaging shaft surfaces. The headless configuration is ideal for space-constrained assemblies where traditional fasteners cannot be accommodated. With Rockwell C45 hardness and black-oxide surface treatment, this set screw maintains structural integrity in demanding environments including automotive, aerospace, and manufacturing equipment where corrosion resistance and dimensional stability are paramount. The 1/8" hex drive facilitates efficient installation in hard-to-reach areas, making it an essential component for maintenance and production applications.

Specification Summary & Compliance

This precision set screw features 1/4"-28 UNF Class 3A fine threads with right-hand direction and maintains strict dimensional accuracy per ASME B18.3 manufacturing standards. The product is fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations regarding substance restrictions. Manufactured from high-strength alloy steel with Rockwell C45 hardness, this 5/8" length set screw with 1/8" hex drive meets industry specifications for reliable performance in critical fastening applications.