S-91770A548 1/4"-20 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 for extended service life in harsh environments
• Enhanced load distribution from the wide truss head design that reduces surface damage and prevents pull-through
• Reliable fastening performance with Class 2A thread fit ensuring consistent engagement and vibration resistance
• High tensile strength rated at 70,000 psi for demanding applications requiring robust mechanical integrity
• Optimized drive efficiency through Phillips No. 3 drive that provides secure torque transmission and reduces cam-out
• Full-thread engagement along the entire 1 3/4" length for maximum grip strength in various material thicknesses
• Industry compliance assurance meeting ASME B18.6.3 specifications for dimensional accuracy and quality standards

Professional Applications & Engineering Value

Engineered for industrial applications where corrosion resistance and structural integrity are paramount, these rounded truss head screws deliver exceptional performance in demanding environments. The passivated 18-8 stainless steel construction provides superior protection against oxidation and chemical exposure, while the wide truss head design distributes clamping force over a larger surface area, preventing damage to softer materials and reducing stress concentration. The UNC coarse thread configuration with Class 2A fit ensures rapid installation and reliable holding power in various substrates, from metal fabrications to industrial equipment assemblies. With full threading along the entire shank length, these Phillips drive screws maintain consistent engagement depth across varying material thicknesses, making them ideal for applications requiring high-strength fastening solutions in manufacturing, machinery, and structural applications where vibration resistance and long-term reliability are critical.

Specification Summary & Compliance

This fastener features precision 1/4"-20 UNC coarse threads with Class 2A thread fit tolerance for consistent engagement and optimal performance. Manufactured in compliance with ASME B18.6.3 standards for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations regarding chemical safety, ensuring environmental responsibility and workplace safety standards.