S-91771A928 2-56 x 5/16" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips 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 passivated 18-8 stainless steel construction, ideal for harsh industrial environments.
- High tensile strength of 80,000 psi ensures reliable, long-lasting fastening under demanding loads.
- Precise Class 2A thread fit provides smooth assembly and consistent engagement in UNC coarse threaded applications.
- 100° countersink angle and flat head design allows for a flush, secure fit, minimizing protrusion and snagging risks.
- Fully threaded shank offers maximum grip and holding power across the entire 5/16" length.
- Phillips #1 drive enables efficient installation with common tools, reducing assembly time.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 2-56 UNC flat head screw is engineered to address common industrial fastening challenges, such as vibration loosening and corrosion-induced failure. The passivated 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for applications in electronics, machinery, and outdoor equipment where durability is critical. The coarse thread spacing and Class 2A thread fit ensure quick, reliable installation in a variety of materials, reducing the risk of cross-threading. With a fully threaded design and Phillips drive, it offers consistent clamping force and ease of use in high-volume assembly lines, enhancing productivity and reducing maintenance needs in demanding engineering environments.
Specification Summary & Compliance
This screw features a 2-56 UNC thread size with Class 2A thread fit for precise dimensional accuracy, ensuring compatibility with standard coarse thread applications. It is manufactured in accordance with ASME B18.6.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for industrial use.
