S-91771A921 0-80 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, ideal for harsh environments and long-term reliability.
- High tensile strength of 80,000 psi ensures secure fastening under demanding mechanical loads and vibration.
- Precise Class 2A thread fit guarantees smooth assembly and consistent performance in fine-thread applications.
- Fully threaded design provides maximum grip and holding power across the entire screw length.
- Standard 100° countersink angle allows for flush mounting, reducing protrusion and improving aesthetics.
- Phillips drive (size #0) offers efficient installation with common tools, minimizing cam-out risks.
- Compliance with ASME B18.6.3, RoHS, and REACH ensures quality, safety, and environmental standards are met for global use.
Professional Applications & Engineering Value
This 0-80 UNF flat head screw is engineered for precision applications where space constraints and material integrity are critical. The passivated 18-8 stainless steel provides excellent resistance to oxidation and chemicals, making it suitable for electronics, medical devices, and aerospace components that require durability in corrosive conditions. The fine thread and Class 2A fit deliver reliable engagement in thin materials, reducing the risk of stripping. With a Rockwell B80 hardness and fully threaded right-hand design, it ensures consistent clamping force and ease of installation in automated or manual assembly lines. The flat head profile and Phillips drive enable seamless integration into countersunk holes, maintaining a low profile for streamlined designs.
Specification Summary & Compliance
This screw adheres to inch system measurements with a length of 5/16" and thread size 0-80 UNF, featuring Class 2A thread fit for precise tolerance. It meets ASME B18.6.3 specifications for dimensional accuracy and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it ensures no hazardous substances, supporting safe and sustainable industrial use.
