S-91375A164 6-40 x 5/16" 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 holding power with fine thread spacing and Class 3A thread fit for precise, vibration-resistant fastening in critical assemblies.
- Exceptional durability provided by alloy steel material with Rockwell C45 hardness, ensuring long-term performance under mechanical stress.
- Enhanced corrosion resistance from the black-oxide surface treatment, extending service life in industrial environments.
- Secure, flush installation with a headless design and cup tip, preventing component movement while maintaining a clean profile.
- Easy, reliable tightening using a 1/16" hex drive, allowing for high torque application without slippage.
- Broad compliance assurance meeting ASME B18.3 specifications, RoHS 3, and REACH, ensuring safety and regulatory adherence.
- Optimized for right-hand thread applications with UNF thread type, delivering consistent engagement in standard machinery.
Professional Applications & Engineering Value
This 6-40 UNF Class 3A set screw is engineered to address common industrial challenges such as component slippage and vibration-induced loosening. Crafted from black-oxide alloy steel, it offers robust strength and corrosion resistance, ideal for demanding environments like automotive assemblies, precision machinery, and electronic enclosures. The fine thread spacing and cup tip design ensure maximum grip on shafts and collars, reducing maintenance needs and enhancing operational safety. By integrating hex drive functionality, it simplifies installation in confined spaces, making it a reliable choice for engineers seeking durable, compliant fasteners that uphold production efficiency and reduce downtime.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit for high precision in UNF fine threads, with a diameter of 0.138" and length of 5/16". It meets ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and reliability in industrial applications.
