S-91773A133 5-40 x 1" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable load-bearing performance
• Precise thread engagement through Class 2A thread fit and UNC coarse threads, ensuring secure fastening and vibration resistance
• Efficient installation with Phillips No. 2 drive and rounded head design, reducing assembly time and tool slippage
• Full thread coverage across the entire 1" length, providing maximum grip and uniform stress distribution
• Regulatory compliance with ASME B18.6.3 standards, RoHS 3, and REACH, ensuring safety and environmental responsibility
• Versatile right-hand threading compatible with standard UNC components for broad application compatibility

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 5-40 UNC rounded head Phillips screws address critical challenges in machinery assembly, electronic enclosures, and automotive components. The 18-8 stainless steel construction combined with a passivated finish significantly enhances resistance to oxidation and chemical exposure, prolonging service life in humid or corrosive environments. The coarse thread design and Class 2A thread fit facilitate quick, secure fastening while minimizing cross-threading risks, which is essential for high-volume production lines. Fully threaded along the 1" length, these screws distribute clamping force evenly, reducing point stress and preventing joint failure under dynamic loads. Compliance with ASME B18.6.3 ensures dimensional consistency, while RoHS and REACH adherence supports sustainable manufacturing practices.

Specification Summary & Compliance

This screw maintains precise Class 2A thread fit per UNC standards, with a diameter of 0.125" and coarse thread spacing. Manufacturing adheres to ASME B18.6.3 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting environmental safety in industrial applications.