S-91375A272 12-24 x 3/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with Class 3A thread fit for secure, vibration-resistant fastening in high-stress applications.
• Superior corrosion resistance from the Black-Oxide finish on Alloy Steel, extending service life in harsh industrial environments.
• High-strength durability backed by Rockwell C45 hardness, resisting wear and deformation under heavy loads.
• Precise, flush mounting enabled by the headless design and cup tip, ideal for applications requiring a smooth surface.
• Easy installation and removal with a 3/32" hex drive, allowing for efficient assembly and maintenance.
• Reliable coarse (UNC) threading for quick engagement and reduced cross-threading risk in right-hand direction applications.
• Broad industry compliance meeting ASME B18.3, RoHS 3, and REACH standards for safety and environmental responsibility.

Professional Applications & Engineering Value

This 12-24 UNC set screw is engineered to solve critical fastening challenges in industrial machinery, automotive components, and precision equipment. The Black-Oxide Alloy Steel construction provides excellent resistance to rust and oxidation, which is vital for maintaining integrity in humid or corrosive settings. Its headless design and cup tip allow for flush mounting, preventing interference in compact assemblies while applying concentrated clamping force to secure shafts, collars, and pulleys. The coarse UNC thread with a Class 3A fit ensures tight tolerances and reliable performance in high-vibration environments, reducing the risk of loosening over time. By integrating a 3/32" hex drive, it supports quick tool engagement, streamlining installation in hard-to-reach areas and boosting productivity for maintenance teams and OEMs.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and a UNC coarse thread with 12-24 size. It is manufactured in compliance with ASME B18.3 specifications, ensuring consistent quality and performance. Additionally, the product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries and commitment to environmental standards.