S-91773A595 5/16"-18 x 3" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 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 performance under heavy loads
• Optimized drive engagement with Phillips No. 3 drive style ensuring secure installation and reduced cam-out risk
• Precise thread fit with Class 2A UNC coarse threads providing excellent assembly consistency and vibration resistance
• Versatile partial threading design allowing for effective clamping across a 1 1/2" minimum threaded length
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
• Environmental responsibility with RoHS 3 and REACH compliance, ensuring safe use in regulated applications

Professional Applications & Engineering Value

This 5/16"-18 x 3" rounded head Phillips screw delivers critical engineering value through its 18-8 stainless steel composition and passivated finish, specifically engineered to combat corrosion in demanding environments like marine equipment, food processing machinery, and outdoor structures. The UNC coarse thread configuration with Class 2A fit ensures rapid installation and maintains clamping force despite vibration, while the partially threaded design provides optimal grip range for varied material thicknesses. The rounded head profile with 0.59" diameter offers a finished appearance while the Phillips No. 3 drive facilitates efficient assembly in automated or manual fastening operations, making it an ideal industrial screw solution where reliability, corrosion resistance, and regulatory compliance are paramount.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread specifications (5/16"-18). Fully compliant with ASME B18.6.3 manufacturing standards for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions. Features right-hand threading, partial threading (1 1/2" minimum thread length), and passivated surface treatment for enhanced performance in industrial fastener applications.