S-92210A431 1/4"-28 x 3" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head 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 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional thread precision with Class 3A fit and UNF fine threading ensures reliable, vibration-resistant connections
- High tensile strength of 70,000 psi provides dependable performance under heavy loads and stress
- Optimized flush mounting with 82° countersink angle and flat head design for seamless surface integration
- Secure hex drive installation using 5/32" drive prevents cam-out and allows for high torque application
- Full 3" threading offers maximum grip length and adjustment flexibility in deep applications
- Compliance with ASME B18.3 standards guarantees dimensional accuracy and interchangeability
Professional Applications & Engineering Value
This 1/4"-28 UNF Class 3A flat head screw delivers critical engineering advantages in demanding applications. The 18-8 stainless steel material combined with passivated finish provides excellent resistance to corrosion and chemical exposure, making it ideal for marine, food processing, and outdoor equipment. The fine thread spacing and Class 3A thread fit ensure superior vibration resistance and precise alignment in machinery assembly, while the hex drive design prevents stripping during high-torque installation. With fully threaded construction and 82° countersink angle, it offers reliable fastening in aerospace components, automotive systems, and industrial machinery where flush surface mounting and maximum thread engagement are essential.
Specification Summary & Compliance
This flat head screw features precision Class 3A thread fit with UNF fine thread standard (1/4"-28) and right-hand threading. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental and safety regulations for industrial use.
