S-91375A069 1-72 x 3/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in demanding industrial environments.
• Precise, vibration-resistant fastening achieved through Class 3A thread fit and fine UNF threads, minimizing loosening under dynamic loads.
• High-strength performance backed by Rockwell C45 hardness, ensuring reliable clamping force and durability.
• Secure, flush mounting with headless design and cup tip, providing excellent holding power without protruding components.
• Easy installation and removal using a standard 0.035" hex drive, facilitating efficient assembly and maintenance.
• Broad compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
• Right-hand thread direction for standard application compatibility and straightforward usage in various assemblies.

Professional Applications & Engineering Value

This 1-72 UNF set screw is engineered to address critical challenges in precision assemblies, such as shaft collars, gears, and pulleys, where space constraints and vibration resistance are paramount. The black-oxide alloy steel construction provides enhanced corrosion protection, reducing maintenance needs in humid or corrosive settings. Its cup tip design bites securely into surfaces, preventing slippage and ensuring consistent clamping force, while the fine thread spacing and Class 3A thread fit deliver tight tolerances for minimal backlash in high-precision machinery. Ideal for industrial automation, automotive, and electronics, this screw offers reliable performance in applications demanding exact alignment and long-term reliability under stress.

Specification Summary & Compliance

This set screw features a 1-72 UNF thread size with Class 3A thread fit for high precision, manufactured in accordance with ASME B18.3 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The product maintains strict dimensional accuracy, including a 3/8" length and 0.073" thread diameter, supporting consistent performance in regulated industrial applications.