S-91385A357 1/4"-28 x 5/8" 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 vibration resistance with nylon patch thread locker that maintains locking performance from -50°F to 250°F, preventing loosening in demanding environments.
- Exceptional strength and durability from alloy steel construction and Rockwell C45 hardness, ensuring long-term reliability under high stress.
- Precise fine thread engagement with UNF Class 3A fit for secure fastening in critical assemblies, reducing the risk of stripping.
- Corrosion-resistant black-oxide finish that enhances surface protection and extends service life in industrial settings.
- Easy installation and removal using a standard 1/8" hex drive, ideal for headless applications where space is limited.
- Effective grip and positioning with a cup point design that bites into materials for non-slip holding power.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address common industrial challenges like vibration-induced loosening and component misalignment. The nylon patch thread locker provides reliable locking without requiring additional adhesives, making it ideal for machinery, automotive, and aerospace applications where temperature fluctuations from -50°F to 250°F occur. Its UNF fine threads and Class 3A fit ensure tight tolerances and secure fastening in precision assemblies, while the headless hex drive design allows for flush mounting in confined spaces. By combining high Rockwell C45 hardness with a corrosion-resistant finish, this screw delivers long-term performance in harsh environments, reducing maintenance needs and downtime.
Specification Summary & Compliance
This set screw features a 1/4"-28 UNF fine thread with Class 3A fit for precise dimensional accuracy, and it is manufactured to meet ASME B18.3 standards. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety requirements are met for industrial use.
