S-91375A584 1/4"-20 x 5" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Maximum holding power through Class 3A thread fit for secure, vibration-resistant fastening in demanding applications
• Enhanced corrosion resistance with black-oxide finish on alloy steel, extending service life in industrial environments
• Superior durability from Rockwell C45 hardness, resisting wear and deformation under high stress
• Efficient installation and removal with 1/8" hex drive, allowing high torque application without head protrusion
• Reliable grip and alignment from cup tip design, minimizing component slippage and damage
• Broad compatibility with UNC coarse 1/4"-20 threads, fitting standard components for versatile use
• Regulatory peace of mind with compliance to ASME B18.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional performance in heavy-duty industrial settings where vibration resistance and long-term reliability are critical. The Class 3A thread fit ensures precise engagement with mating components, reducing the risk of loosening in machinery, automotive assemblies, and precision equipment. Its headless hex drive design allows flush mounting in confined spaces, while the cup tip provides concentrated contact pressure to prevent shaft or hub movement. Manufactured to ASME B18.3 specifications with UNC coarse threads, it offers consistent quality for OEM and MRO applications, supported by RoHS 3 and REACH compliance for environmental safety.

Specification Summary & Compliance

This set screw features a 1/4"-20 UNC coarse thread with Class 3A fit for high precision and strength. It meets ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to industry and environmental requirements.