S-91773A535 1/4"-20 x 3/8" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable load-bearing performance
• Optimized thread engagement through UNC coarse threading and Class 2A fit, ensuring secure fastening and reduced cross-threading risk
• Enhanced drive stability with No. 3 Phillips drive and rounded head design, providing superior torque transmission and reduced cam-out
• Full-threaded design for maximum grip length and uniform stress distribution across the entire fastener
• Regulatory compliance assurance meeting ASME B18.6.3 standards, RoHS 3, and REACH for global market acceptance
• Versatile installation capability with right-hand threading compatible with standard industrial equipment and procedures

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 18-8 stainless steel rounded head screws deliver critical corrosion resistance where moisture, chemicals, or outdoor exposure threaten fastener integrity. The passivated finish enhances surface durability while maintaining the material's inherent anti-corrosive properties. With UNC coarse threading and Class 2A thread fit, these fasteners provide rapid installation in various materials while maintaining precise tolerance control. The combination of 100,000 psi tensile strength and Rockwell B100 hardness ensures reliable performance in vibration-prone environments, making them ideal for machinery assembly, electrical enclosures, and structural frameworks where joint integrity is paramount. The rounded head profile with Phillips drive offers both aesthetic appeal and practical installation advantages in confined spaces.

Specification Summary & Compliance

This fastener maintains precise Class 2A thread fit per UNC standards with 1/4"-20 coarse threading and 3/8" length. Manufacturing and dimensional compliance is verified to ASME B18.6.3 specifications. Environmental and safety compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring suitability for international markets and restricted substance requirements.