S-91773A581 5/16"-18 x 3/4" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 100,000 PSI tensile strength and Rockwell B100 hardness for reliable heavy-duty performance
• Optimized installation efficiency through Phillips No. 3 drive design and fully threaded UNC coarse spacing
• Precise thread engagement with Class 2A thread fit ensuring consistent fastening and vibration resistance
• Broad regulatory compliance meeting ASME B18.6.3 specifications plus RoHS and REACH environmental standards
• Versatile rounded head design providing smooth surface profile while maintaining strong clamping force
• Right-hand threading compatibility with standard UNC 5/16"-18 configuration for easy integration

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 18-8 stainless steel rounded head screws deliver critical corrosion resistance through their passivated finish, significantly extending service life in moisture-prone applications. The fully threaded UNC coarse spacing enables rapid installation while maintaining superior pull-out strength, making them ideal for assembly lines requiring both speed and reliability. With 100,000 PSI tensile strength and Class 2A thread fit, these Phillips head screws provide consistent clamping force in machinery, electrical enclosures, and structural frameworks where vibration resistance is paramount. The combination of ASME B18.6.3 compliance and environmental regulations adherence ensures they meet rigorous quality standards for OEM and MRO applications across multiple industries.

Specification Summary & Compliance

This 5/16"-18 UNC threaded screw maintains precision Class 2A thread fit tolerances with coarse thread spacing for optimal engagement. Manufacturing conforms to ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring restricted substance compliance for global industrial applications.