S-91781A724 1/2"-13 x 3" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws
Stainless Steel Slotted Flat Head 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 18-8 Stainless Steel and passivated finish, ideal for harsh industrial environments
- High tensile strength of 80,000 psi ensures reliable fastening under heavy loads and vibration
- Precise Class 2A thread fit provides smooth assembly and consistent engagement in UNC coarse threading applications
- 82° countersink angle and flat head design allows for flush mounting and improved aesthetics in finished products
- Rockwell B80 hardness delivers excellent durability and resistance to wear over repeated use
- Partial threading offers optimal grip length control for specific material thicknesses
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global supply chains
Professional Applications & Engineering Value
This 1/2"-13 UNC flat head screw in 18-8 Stainless Steel is engineered to address common industrial challenges such as corrosion, mechanical stress, and assembly efficiency. The passivated finish enhances the innate corrosion resistance of stainless steel, making it suitable for outdoor equipment, marine hardware, and chemical processing facilities where moisture and chemicals are prevalent. Its coarse UNC threading and Class 2A thread fit ensure quick installation and reduced cross-threading risks in wood, metal, and composite materials. The flat head with 82° countersink provides a secure, flush fit that minimizes protrusion, improving safety and streamlining surfaces in machinery, automotive components, and structural assemblies. With a robust 80,000 psi tensile strength, it reliably maintains joint integrity in high-vibration environments, reducing maintenance needs and downtime.
Specification Summary & Compliance
This screw adheres to ASME B18.6.3 specifications, ensuring dimensional accuracy and performance reliability. Threading conforms to UNC coarse thread standards with a Class 2A thread fit for consistent tolerance. It is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.
