S-91385A351 1/4"-28 x 1/4" 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 vibration resistance with nylon patch thread locker that maintains secure fastening from -50°F to 250°F
- Exceptional durability through Rockwell C45 hardened black-oxide alloy steel construction
- Precise thread engagement with Class 3A UNF fine threads for reliable, tight-fitting connections
- Easy installation and removal using the 1/8" hex drive in confined spaces where headless design is essential
- Enhanced gripping power from the cup point design that digs into mating surfaces for permanent positioning
- Industry compliance assurance meeting ASME B18.3 specifications for consistent quality and performance
- Environmental regulation compliance with RoHS 3 and REACH standards for safe industrial use
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical reliability in demanding industrial applications where vibration resistance and permanent positioning are paramount. The nylon patch thread locker provides consistent locking performance across extreme temperature ranges (-50°F to 250°F), eliminating the need for additional locking hardware. Engineered with Class 3A UNF fine threads, this headless set screw ensures precise fitment in machinery, automotive assemblies, and precision equipment where space constraints require compact fastening solutions. The cup point design creates permanent seating by digging into shaft materials, preventing component slippage in high-torque applications while the 1/8" hex drive facilitates installation in confined spaces.
Specification Summary & Compliance
This set screw features 1/4"-28 UNF fine threads with Class 3A thread fit for precision tolerance, manufactured from black-oxide alloy steel with Rockwell C45 hardness. The fastener meets ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring quality construction and regulatory compliance for industrial applications.
