S-92695A653 1/4"-28 x 7/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with a 90° cone point tip that bites securely into materials, preventing component slippage
• Exceptional thread precision with Class 3A fit for reliable, vibration-resistant fastening in demanding applications
• Enhanced corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh environments
• High-strength durability with Rockwell C45 hardness, ensuring the set screw maintains integrity under heavy loads
• Easy installation and removal using a standard 1/8" hex drive, compatible with common tools for efficient maintenance
• Space-saving headless design ideal for applications where a flush surface is required without protrusion
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global industrial use

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A set screw is engineered to address critical challenges in machinery assembly, such as securing gears, pulleys, and collars on shafts without movement. The black-oxide alloy steel construction provides excellent resistance to wear and environmental factors, while the fine thread spacing and right-hand thread design ensure tight, precise engagement. The cone point tip concentrates force for maximum grip, reducing the risk of loosening under vibration—common in automotive, aerospace, and industrial equipment. By combining high Rockwell C45 hardness with a headless hex drive, it offers a reliable solution for permanent or adjustable fastening in tight spaces, enhancing operational safety and reducing maintenance downtime.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit for inch-based systems, ensuring precise dimensional accuracy per UNF fine thread standards. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for international industrial use.