S-91771A620 3/8"-16 x 5/8" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional mechanical strength delivering 80,000 psi tensile strength and Rockwell B80 hardness for heavy-duty applications
- Precision thread engagement with Class 2A UNC coarse threads ensuring reliable fastening and vibration resistance
- Optimized flush mounting featuring standard 82° countersink angle for seamless surface integration
- Enhanced driving efficiency through Phillips No. 4 drive design reducing cam-out during installation
- Full-threaded reliability providing maximum grip length and uniform stress distribution
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards
Professional Applications & Engineering Value
These 3/8"-16 UNC flat head screws deliver critical engineering solutions where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction prevents oxidation in marine, chemical processing, and outdoor applications, while the 80,000 psi tensile strength maintains joint integrity under dynamic loads. The coarse UNC threading provides rapid installation in soft materials and castings, with Class 2A thread fit ensuring consistent engagement without binding. The 82° countersink and fully threaded design create flush-mounted, high-strength connections ideal for machinery, structural frameworks, and equipment requiring vibration-resistant fastening and long-term reliability.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 dimensional standards with Class 2A thread fit tolerance for precision assembly. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features 3/8"-16 UNC coarse threads, 5/8" length, and 82° standard countersink angle for industry-standard compatibility across industrial fastening applications.
