S-91770A204 8-32 x 1 3/4" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments.
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-term performance.
• Enhanced load distribution from the wide truss head design, reducing surface pressure and material damage.
• Efficient installation using a standard Phillips No. 2 drive, minimizing slippage and tool wear.
• Secure coarse thread engagement with UNC 8-32 threads and Class 2A fit for quick assembly and vibration resistance.
• Full 1-3/4" threading ensures maximum grip length and uniform stress distribution in various material thicknesses.
• Compliance with major standards including ASME B18.6.3, RoHS 3, and REACH for safe, regulated use.

Professional Applications & Engineering Value

This 8-32 UNC coarse thread screw with a rounded truss head is engineered to address common industrial challenges such as vibration loosening and corrosion. The passivated 18-8 stainless steel provides excellent resistance to oxidation and chemicals, making it suitable for outdoor, marine, and chemical processing equipment. The wide truss head offers a larger bearing surface, which helps prevent pull-through in softer materials and distributes clamp load effectively. Combined with a Phillips drive and fully threaded design, it ensures rapid, secure fastening in assembly lines, machinery, and structural frameworks where durability and regulatory compliance are critical.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and UNC coarse threads for consistent performance. It is manufactured in accordance with ASME B18.6.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for industrial use.