S-91770A544 1/4"-20 x 1 1/4" 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
• Enhanced load distribution from the wide truss head design, reducing surface pressure and preventing material damage
• High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under stress
• Secure and efficient installation using the Phillips No. 3 drive, minimizing cam-out and ensuring tight fastening
• Consistent thread engagement with UNC coarse threading and Class 2A fit, providing reliable assembly in various materials
• Full thread coverage along the 1-1/4" length for maximum grip and adjustment flexibility in applications
• Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for safe, quality-conscious usage

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these passivated 18-8 stainless steel truss head screws address common challenges like corrosion-induced failure and uneven load distribution. The wide truss head profile significantly increases bearing surface area, dispersing clamping force effectively to prevent surface damage on softer materials or thin panels. With UNC coarse threads and Class 2A thread fit, they ensure rapid, reliable installation in metal, plastic, and composite assemblies, reducing assembly time while maintaining precision. The fully threaded design offers versatile positioning, making them ideal for machinery, electrical enclosures, and structural frameworks where vibration resistance and long-term durability are critical. Their compliance with ASME B18.6.3 guarantees dimensional consistency, streamlining procurement and replacement in regulated industries.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard tolerance and easy assembly. Manufactured in accordance with ASME B18.6.3 specifications, it ensures dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmentally responsible sourcing for industrial fastener applications.