S-91773A583 5/16"-18 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 construction and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength delivering 100,000 psi tensile strength and Rockwell B100 hardness for demanding applications
• Reliable thread engagement through UNC coarse threading with Class 2A fit for secure fastening and vibration resistance
• Optimized drive performance with Phillips No. 3 drive providing efficient installation and reduced cam-out risk
• Full threading capability ensuring maximum grip length and consistent clamping force across the entire fastener
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
• Environmental responsibility through RoHS 3 and REACH compliance for sustainable manufacturing practices

Professional Applications & Engineering Value

These 18-8 stainless steel rounded head Phillips screws provide critical corrosion resistance where moisture, chemicals, or outdoor exposure would degrade ordinary fasteners. The passivated finish enhances surface durability while maintaining the material's inherent anti-corrosion properties. Engineered with UNC coarse threads and Class 2A thread fit, these fully threaded fasteners deliver superior holding power in various materials including metals, plastics, and composites. The combination of 100,000 psi tensile strength and Rockwell B100 hardness ensures reliable performance in structural applications, machinery assembly, and industrial equipment where vibration resistance and long-term reliability are paramount. The rounded head design with Phillips No. 3 drive facilitates quick installation while providing a finished appearance suitable for visible applications.

Specification Summary & Compliance

This 5/16"-18 x 1" fully threaded screw features precision UNC coarse threads with Class 2A thread fit per ASME standards. Manufactured to exacting ASME B18.6.3 specifications for dimensional accuracy and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring responsible manufacturing and material sourcing. The fastener maintains consistent 0.313" thread diameter and right-hand thread direction for standardized installation across industrial applications.