S-91770A191 8-32 x 5/16" 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 damage and material stress
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Secure and efficient installation with Phillips No. 2 drive, preventing cam-out during high-torque assembly
• Reliable thread engagement through fully threaded 8-32 UNC coarse spacing, ensuring quick fastening in various materials
• Precision manufacturing with Class 2A thread fit for consistent quality and reduced assembly issues
• Regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH standards for safe, global industrial use

Professional Applications & Engineering Value

These 8-32 UNC rounded truss head screws are engineered to address common industrial challenges, such as vibration loosening and corrosion in demanding environments. The passivated 18-8 stainless steel provides excellent durability against moisture and chemicals, while the wide truss head distributes clamping force effectively, minimizing surface damage on softer materials. With coarse thread spacing and full threading, they offer rapid installation and strong holding power in wood, plastic, or metal assemblies. The Phillips No. 2 drive ensures reliable torque transfer, making them ideal for automotive, electronics, and machinery applications where consistent performance and regulatory compliance are critical.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and 8-32 UNC coarse threading for accurate fastening. It is manufactured in compliance with ASME B18.6.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in industrial and consumer products.