S-91375A163 6-40 x 3/8" ASME B18.3, ASTM F912 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with Black-Oxide Alloy Steel construction, ideal for harsh industrial environments
- Maximum holding power ensured by Class 3A thread fit and fine thread spacing for secure, vibration-resistant fastening
- High durability with Rockwell C45 hardness, providing excellent wear resistance and long service life
- Easy installation and removal using a standard 1/16" hex drive, even in confined spaces due to its headless design
- Precise alignment and minimal surface damage thanks to the cup tip design, protecting components during tightening
- Reliable performance in right-hand thread applications, compatible with standard UNF threading systems
- Compliance with industry standards including ASME B18.3, ensuring consistent quality and interchangeability
Professional Applications & Engineering Value
This 6-40 UNF Class 3A set screw is engineered for demanding industrial applications where precision and reliability are critical. The Black-Oxide Alloy Steel material offers enhanced corrosion resistance, reducing maintenance needs in environments exposed to moisture or chemicals. Its headless design with a 1/16" hex drive allows for flush mounting in tight spaces, while the fine thread spacing and Class 3A fit provide superior grip and resistance to loosening under vibration. Commonly used in machinery, automotive assemblies, and precision instruments, this screw ensures secure component positioning with its cup tip that minimizes surface marring. The Rockwell C45 hardness further supports heavy-duty use, making it a trusted choice for engineers seeking durability and compliance with ASME B18.3 standards.
Specification Summary & Compliance
This set screw adheres to precise dimensional tolerances, including a Class 3A thread fit for high accuracy in UNF fine threading with a 6-40 size. It meets ASME B18.3 specifications for consistency 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.
