S-91375A225 5-44 x 5/16" 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 fastening in demanding applications
• Enhanced corrosion resistance from the black-oxide finish, extending service life in industrial environments
• High-strength durability provided by alloy steel with Rockwell C45 hardness, resisting deformation under load
• Secure, flush installation with headless design and cup tip, preventing component interference and improving aesthetics
• Easy installation and removal using the 1/16" hex drive, allowing efficient maintenance in tight spaces
• Reliable fine thread engagement with UNF 5-44 specification, ensuring better tension control and reduced loosening
• Broad compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, regulated use

Professional Applications & Engineering Value

This 5-44 UNF Class 3A set screw is engineered to address critical challenges in precision assembly and machinery. The black-oxide alloy steel construction combats rust and wear, ideal for automotive, aerospace, and manufacturing equipment where environmental exposure is a concern. Its fine thread spacing and cup tip design deliver concentrated clamping force, preventing shaft slippage and minimizing damage to secured components. The headless profile and hex drive enable seamless integration into compact designs, reducing protrusion risks. By ensuring consistent performance in high-vibration settings, this set screw enhances operational reliability and reduces maintenance downtime for engineers and OEMs.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit tolerances for exceptional precision, with UNF fine threads (5-44 size) and right-hand direction. It conforms to ASME B18.3 manufacturing specifications and is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory alignment for global supply chains.