S-91375A151 6-32 x 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments.
• High-strength performance from alloy steel and Rockwell C45 hardness, ensuring reliable, long-term fastening under load.
• Precise thread engagement with Class 3A fit and UNC coarse threads, providing secure, vibration-resistant connections.
• Easy installation and removal using the 1/16" hex drive, allowing efficient assembly in confined spaces.
• Effective grip and minimal surface damage from the cup tip design, ideal for securing rotating components like shafts and collars.
• Space-saving headless design for applications where a flush or low-profile finish is required.
• Compliance with major industry standards including ASME B18.3, ensuring consistent quality and interchangeability.

Professional Applications & Engineering Value

This 6-32 UNC thread set screw is engineered to address common industrial challenges such as component slippage, corrosion, and installation efficiency. The black-oxide alloy steel construction provides a durable barrier against rust and wear, making it suitable for machinery, automotive, and electrical assemblies exposed to moisture or friction. With a Class 3A thread fit and coarse spacing, it ensures quick alignment and robust holding power, reducing the risk of loosening in high-vibration settings. The hex drive and headless design allow for straightforward tool access in tight spaces, while the cup tip concentrates clamping force to prevent damage to shafts or gears. Ideal for securing pulleys, knobs, and bearings, this set screw delivers reliable performance in demanding industrial applications.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, with precise UNC thread dimensions (6-32 size, 0.138" diameter) and Class 3A thread fit for accurate tolerance. It is manufactured from alloy steel with a Rockwell C45 hardness and measures 3/4" in length. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for global industrial use.