S-91771A898 3/8"-16 x 1" 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 long-lasting performance in harsh industrial environments
- High tensile strength of 80,000 psi ensures reliable fastening in demanding applications and prevents mechanical failure
- Optimized flush mounting with undercut flat head profile and 82° countersink angle for seamless surface integration
- Efficient installation using Phillips No. 4 drive that provides secure tool engagement and reduces slippage
- Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fit and vibration resistance
- Full threading along 1" length offers maximum grip depth and uniform load distribution across joined materials
- Comprehensive regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These 3/8"-16 UNC flat head Phillips screws deliver exceptional engineering value through their passivated 18-8 stainless steel composition and specialized design. The undercut flat head profile combined with the 82° countersink angle creates a flush surface finish that eliminates protrusions in precision assemblies. The coarse UNC threading provides superior holding power in softer materials and resists loosening under vibration, while the fully threaded design ensures maximum engagement depth. With 80,000 psi tensile strength and Rockwell B80 hardness, these fasteners maintain structural integrity in high-stress applications across machinery, automotive, and construction sectors. The Phillips No. 4 drive enables efficient installation without specialized tools, reducing assembly time while maintaining torque consistency.
Specification Summary & Compliance
Manufactured to exacting standards with Class 2A thread fit for consistent dimensional accuracy and reliable performance. These flat head screws feature 3/8"-16 UNC coarse threads with right-hand orientation and comply with ASME B18.6.3 specifications. The fasteners are fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental and safety regulations for industrial components.
