S-91770A875 3/8"-16 x 5/8" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Superior load distribution from the wide truss head design, preventing surface damage and maintaining structural integrity
• High tensile strength of 70,000 psi ensures reliable performance under heavy mechanical stress
• Optimized installation efficiency with Phillips No. 4 drive and coarse UNC threading for quick, secure fastening
• Precise Class 2A thread fit guarantees consistent engagement and vibration resistance in assembled components
• Full threading along the 5/8" length provides maximum grip and adjustment flexibility in various material thicknesses
• Comprehensive regulatory compliance with ASME B18.6.3, RoHS 3, and REACH standards for global industrial acceptance

Professional Applications & Engineering Value

Engineered for demanding industrial fastening applications, these rounded truss head screws deliver critical advantages in machinery assembly, electrical enclosures, and structural frameworks. The passivated 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, significantly extending service life in corrosive environments. The combination of coarse UNC threading and Class 2A fit ensures rapid installation with minimal cross-threading risk, while the wide truss head profile distributes clamping force effectively to prevent sheet metal deformation. With 70,000 psi tensile strength and Rockwell B70 hardness, these screws maintain joint integrity under dynamic loads and vibration, making them ideal for high-stress mechanical systems where reliability is paramount.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread tolerances for consistent dimensional accuracy. Features 3/8"-16 UNC coarse threads in right-hand orientation with full threading along the 5/8" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries. Material certification confirms 18-8 stainless steel composition with passivated surface treatment for enhanced corrosion protection.