S-91771A093 3-48 x 5/16" 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
- High tensile strength of 80,000 psi ensures reliable fastening under demanding mechanical loads
- Precise Class 2A thread fit provides smooth installation and secure engagement in UNC coarse threaded applications
- Standard 82° countersink angle enables flush mounting for clean, professional finishes
- Full threading along 5/16" length maximizes grip range and holding power
- No. 1 Phillips drive design offers efficient torque transfer and reduced cam-out risk
- Rockwell B80 hardness rating maintains thread integrity through repeated installations
Professional Applications & Engineering Value
These 3-48 UNC flat head Phillips screws deliver exceptional engineering value in industrial applications where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides superior protection against oxidation and chemical exposure, making them ideal for electronics enclosures, machinery panels, and marine equipment. The combination of coarse UNC threading and Class 2A fit ensures rapid installation in various materials while maintaining vibration resistance. The 82° countersink angle and flat head profile create seamless surfaces critical for aerodynamic components and safety-critical assemblies. These fully threaded screws distribute clamping force evenly, preventing joint loosening in high-vibration environments common in manufacturing and automotive applications.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for precision engagement. Features UNC coarse threads with right-hand orientation and complete compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 5/16" length and fully threaded design maintain consistent performance across industrial applications requiring reliable fastening solutions.
