S-91771A056 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 or humid environments.
- High tensile strength of 80,000 psi ensures reliable load-bearing capacity and joint integrity in demanding applications.
- Precise Class 2A thread fit guarantees smooth installation and secure fastening with minimal risk of cross-threading.
- Fully threaded design provides maximum grip and uniform clamping force along the entire screw length.
- 82° countersink angle and flat head profile allow for a flush, low-profile finish that minimizes protrusion and snagging.
- Phillips drive (No. 0) offers common tool compatibility and efficient torque transfer during assembly.
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 0-80 UNF flat head Phillips machine screw is engineered for precision assemblies where space constraints and material compatibility are critical. The passivated 18-8 stainless steel provides excellent resistance to oxidation and chemical exposure, making it suitable for electronics, medical devices, and marine equipment. The fine UNF thread and Class 2A fit deliver superior holding power in thin materials, reducing the risk of stripping. With an 82° countersink, it sits flush in pre-drilled holes, enhancing aesthetics and safety in consumer products and machinery. Fully threaded for consistent engagement, this screw is a reliable choice for OEMs and maintenance teams seeking durability and regulatory compliance.
Specification Summary & Compliance
This fastener meets ASME B18.6.3 specifications for dimensional accuracy, with a Class 2A thread fit ensuring precise tolerances. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances. Manufacturing adheres to standard UNF fine thread profiles and 82° countersink angle requirements, supporting consistent performance in industrial applications.
