S-91770A198 8-32 x 7/8" 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 holding power from 70,000 psi tensile strength and Rockwell B70 hardness for reliable fastening performance
• Enhanced load distribution through wide rounded truss head design that reduces surface pressure and prevents pull-through
• Quick installation efficiency with No. 2 Phillips drive and coarse UNC threads for faster assembly in production environments
• Precise thread engagement with Class 2A thread fit ensuring consistent performance and reduced cross-threading risks
• Maximum fastening coverage through fully threaded design that provides complete engagement along the entire 7/8" length
• Regulatory compliance assurance meeting ASME B18.6.3 standards plus RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

This 8-32 UNC rounded truss head screw delivers critical engineering advantages for industrial assembly applications where vibration resistance and corrosion protection are paramount. The passivated 18-8 stainless steel construction provides exceptional durability against chemical exposure and atmospheric conditions, significantly extending service life in manufacturing equipment, electrical enclosures, and outdoor installations. The unique wide rounded truss head design offers superior clamping force distribution, preventing damage to softer materials while the coarse thread configuration ensures rapid installation in production lines. With fully threaded construction and Class 2A thread fit, these screws maintain consistent torque values and clamping force across diverse material thicknesses, reducing assembly time and improving joint reliability in high-vibration environments.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse thread specifications. Complies with ASME B18.6.3 manufacturing standards for dimensional accuracy and performance. Meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations for chemical safety. Features include 8-32 thread size, 7/8" length, No. 2 Phillips drive, and right-hand thread direction with full threading along the entire shank length.