S-91375A623 3/8"-16 x 7/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide alloy steel construction, extending service life in harsh industrial environments
• Maximum holding power from the cup point design that bites into shafts and components for secure, permanent positioning
• Precise thread engagement with Class 3A fit, ensuring reliable fastening and reducing the risk of loosening under vibration
• High durability with Rockwell C45 hardness, providing excellent wear resistance and maintaining performance under heavy loads
• Easy installation and removal using a standard 3/16" hex key, saving time during assembly and maintenance
• Broad compatibility with UNC coarse threads, allowing for quick installation and reducing cross-threading risks
• Headless design for flush mounting in confined spaces, enabling sleek assemblies without protruding hardware

Professional Applications & Engineering Value

This 3/8"-16 UNC set screw is engineered to address critical challenges in industrial fastening, such as component slippage and corrosion-induced failure. The black-oxide alloy steel material offers enhanced protection against rust and oxidation, making it ideal for applications in machinery, automotive systems, and outdoor equipment where exposure to moisture is common. The cup point design provides aggressive gripping action, securely locking gears, pulleys, and collars onto shafts without the need for additional locking mechanisms. With a Class 3A thread fit and coarse thread spacing, it ensures rapid assembly and reliable performance in high-vibration environments, reducing maintenance downtime and improving operational efficiency for B2B clients in manufacturing and engineering sectors.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit tolerances for precise engagement, with UNC coarse threads (3/8"-16) and a right-hand thread direction. It meets ASME B18.3 and ASTM F912 specifications for dimensional accuracy and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial markets.