S-91771A628 3/8"-16 x 1 1/2" 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 for extended service life in harsh environments
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness to withstand high-stress 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 installation efficiency with Phillips No. 4 drive providing secure tool engagement and reduced cam-out risk
- Full-thread design delivering maximum grip length and load distribution across the entire fastener
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards (RoHS 3, REACH)
Professional Applications & Engineering Value
These 3/8"-16 UNC flat head screws deliver critical performance advantages for industrial applications where flush surface mounting and corrosion resistance are paramount. The passivated 18-8 stainless steel construction provides excellent protection against oxidation and chemical exposure, making these fully threaded screws ideal for marine equipment, food processing machinery, and outdoor structures. The coarse thread design ensures rapid installation and superior holding power in various materials, while the 82° countersink angle creates a smooth, professional finish. With 80,000 psi tensile strength, these flat head machine screws maintain structural integrity under dynamic loads and vibration, solving common fastening failure points in demanding industrial environments.
Specification Summary & Compliance
Manufactured to exacting standards with Class 2A thread fit tolerances and UNC coarse thread specifications. Complies with ASME B18.6.3 mechanical standards for dimensional accuracy and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features right-hand thread direction and 1-1/2" length with complete threading for consistent fastening performance.
