S-91375A148 6-32 x 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
• Exceptional holding power from Class 3A thread fit, ensuring secure fastening and reduced loosening under vibration.
• High-strength durability with Rockwell C45 hardness alloy steel, resisting wear and deformation in heavy-duty applications.
• Easy installation and removal using a 1/16" hex key drive, providing reliable torque transfer in confined spaces.
• Effective grip and minimal surface damage from the cup tip design, ideal for securing components on shafts and axles.
• Broad compatibility with UNC coarse threads, facilitating quick assembly and interchangeability in inch-system machinery.
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global industrial use.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to address critical challenges in industrial assembly, such as component slippage and corrosion-induced failure. The UNC coarse threads with Class 3A fit provide tight tolerances that enhance clamping force on shafts, pulleys, and gears, preventing misalignment in high-vibration settings like automotive or machinery manufacturing. The headless hex socket design allows flush mounting in tight spaces, while the cup tip concentrates pressure to minimize damage to secured parts. Combined with Rockwell C45 hardness, it ensures long-term reliability in heavy-duty applications, reducing maintenance needs and downtime.

Specification Summary & Compliance

This set screw adheres to precise inch-system dimensions, including a 6-32 UNC thread size with Class 3A thread fit for high accuracy. It conforms to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.