S-91375A730 1/2"-20 x 1/2" ASME B18.3, ASTM F912 Set Screws
Set Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
- Exceptional thread precision with Class 3A fit for reliable, vibration-resistant fastening in critical assemblies.
- High-strength durability from alloy steel and Rockwell C45 hardness, resisting wear and deformation under heavy loads.
- Secure, flush mounting thanks to the headless design and cup point tip, preventing component slippage and minimizing protrusion.
- Easy installation and removal with a 1/4" hex drive, enabling efficient torque application in confined spaces.
- Fine thread engagement with 1/2"-20 UNF right-hand threads, providing enhanced holding power for precision equipment.
- Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address common industrial challenges such as component misalignment, vibration loosening, and environmental degradation. Its headless design and cup point tip create a firm grip on shafts and collars, making it ideal for securing gears, pulleys, and couplings in machinery, automotive, and aerospace applications. The Class 3A thread fit and fine UNF threads ensure minimal backlash and superior load distribution, reducing maintenance needs. Combined with a hex drive for straightforward installation, this fastener delivers reliable performance in high-stress environments where precision and durability are paramount.
Specification Summary & Compliance
This set screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for precise dimensional accuracy. It features a 1/2"-20 UNF fine thread with right-hand direction, a length of 1/2", and a 1/4" hex drive. The black-oxide alloy steel construction ensures consistent performance, supported by compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial use.
