S-94105A541 1/4"-20 x 1" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for precise, vibration-resistant assemblies
• Excellent corrosion resistance due to black-oxide finish on alloy steel, extending service life
• High-strength performance from Rockwell C45 hardness, preventing deformation under load
• Secure, flush installation with hex drive and headless design for space-constrained applications
• Reliable coarse threading (UNC 1/4"-20) for faster installation and reduced cross-threading risk
• Flat tip design ensures maximum surface contact and minimal component damage
• Full regulatory compliance with RoHS 3 and REACH, meeting global environmental standards

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical performance in demanding industrial settings where vibration resistance and precise positioning are paramount. The hex headless design allows for flush mounting in pulleys, gears, and collars, eliminating protrusions in tight spaces. Its Class 3A UNC coarse threads provide superior grip and faster assembly compared to fine-thread alternatives, reducing installation time while maintaining high clamping force. The flat tip distributes pressure evenly, preventing damage to shafts and components. Manufactured to ASME B18.3 specifications, this fastener ensures interchangeability and reliability in OEM machinery, automotive systems, and precision equipment, offering engineers a compliant, durable solution for permanent or semi-permanent fastening needs.

Specification Summary & Compliance

This set screw features 1/4"-20 UNC Class 3A threads with coarse spacing and right-hand direction, ensuring precise dimensional accuracy per ASME B18.3 standards. The 1" length and flat tip design provide consistent performance. It is manufactured from alloy steel with a black-oxide surface treatment and Rockwell C45 hardness for mechanical durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in regulated industries and international markets.