S-91375A098 3-48 x 5/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with Class 3A thread fit for precise, secure fastening in demanding applications.
• Superior corrosion resistance thanks to the black-oxide finish on alloy steel, extending service life in harsh environments.
• High strength and durability from Rockwell C45 hardness, ensuring reliable performance under heavy loads.
• Easy installation and removal with the 0.050" hex drive, allowing for efficient assembly and maintenance.
• Effective grip and minimal surface damage due to the cup tip design, ideal for securing rotating components.
• Wide industrial compatibility with UNC coarse threads and right-hand direction, suitable for various machinery and equipment.
• Regulatory peace of mind by meeting ASME B18.3, RoHS 3, and REACH standards for safe, compliant use.

Professional Applications & Engineering Value

This 3-48 UNC set screw is engineered to address critical fastening challenges in industrial settings. The black-oxide alloy steel construction provides excellent resistance to rust and wear, making it ideal for applications exposed to moisture or friction, such as in automotive assemblies, machinery shafts, and precision instruments. Its headless design and hex drive enable flush mounting and easy access in confined spaces, while the cup tip ensures a firm grip without marring surfaces, preventing slippage in high-torque environments. With coarse thread spacing and Class 3A thread fit, it offers quick installation and reliable retention, reducing assembly time and maintenance costs. This screw is a trusted solution for engineers seeking durable, RoHS and REACH compliant fasteners that uphold performance standards in heavy-duty operations.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy and consistent quality. It features a Class 3A thread fit for tight tolerances and reliable engagement, with UNC coarse threads and a right-hand direction for broad compatibility. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing it is free from hazardous substances and safe for industrial use. Additional details include a thread size of 3-48, length of 5/8", and drive size of 0.050", all manufactured to meet rigorous industry standards for precision and reliability.