S-91771A636 3/8"-16 x 3" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Precision thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
• Optimized flush mounting featuring standard 82° countersink angle for seamless surface integration
• Enhanced drive stability with Phillips No. 4 drive design providing consistent torque transmission
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards (RoHS 3 & REACH)
• Versatile partial threading allowing combined clamping and alignment functions in assembly applications

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this 3/8"-16 UNC flat head screw delivers critical performance advantages through its passivated 18-8 stainless steel composition and precision manufacturing. The coarse thread configuration provides superior holding power in soft materials and faster installation times, while the 82° countersink angle ensures perfect flush mounting in machinery, equipment frames, and structural assemblies. With partial threading and right-hand thread direction, it offers optimal combination of grip length and unthreaded shank strength, making it ideal for applications requiring both clamping force and precise component alignment. The Phillips No. 4 drive maintains compatibility with standard industrial drivers, ensuring efficient installation in high-volume manufacturing environments.

Specification Summary & Compliance

This flat head screw maintains Class 2A thread fit tolerance per UNC standards with 3/8"-16 coarse thread spacing and minimum 1½" thread length. Manufactured to ASME B18.6.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The inch system measurement ensures dimensional consistency across North American industrial applications.