S-92695A721 4-48 x 3/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit ensuring precise, vibration-resistant connections in demanding applications
• Enhanced corrosion resistance from black-oxide coating, extending service life in industrial environments
• Maximum torque transmission through 0.050" hex drive design, preventing tool slippage during installation
• Deep penetration and secure positioning with 90° cone point angle for reliable component alignment
• Exceptional durability from Rockwell C45 hardened alloy steel, maintaining integrity under heavy loads
• Space-saving headless design allowing flush mounting where clearance is limited
• Fine thread spacing providing superior adjustment precision compared to coarse thread alternatives

Professional Applications & Engineering Value

This 4-48 UNF Class 3A set screw delivers critical engineering solutions for precision assembly applications where vibration resistance and reliable positioning are paramount. The black-oxide alloy steel construction combined with Rockwell C45 hardness ensures exceptional durability in machinery, automotive components, and precision instruments. The 90° cone point design creates concentrated pressure points that prevent shaft slippage in pulleys, gears, and collars, while the fine UNF thread spacing allows for micro-adjustments in sensitive equipment. The headless configuration with hex drive installation makes it ideal for confined spaces where traditional fasteners cannot operate, providing engineers with a versatile solution for permanent and semi-permanent fastening requirements across multiple industrial sectors.

Specification Summary & Compliance

This precision set screw features 4-48 UNF threads with Class 3A thread fit for superior dimensional accuracy and tight tolerances. Manufactured to meet ASME B18.3 specifications where applicable per ASTM F912, ensuring consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial use. Thread direction is right hand with fine thread spacing, and the fastener maintains precise dimensional control throughout its 3/8" length for reliable performance in critical applications.