S-91771A930 2-56 x 7/16" 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
- Exceptional corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments.
- High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration.
- Precise Class 2A thread fit guarantees smooth installation and secure fastening in UNC coarse threaded applications.
- Fully threaded design provides maximum grip and holding power along the entire 7/16" length.
- Standard 100° countersink angle allows for a flush, professional finish in countersunk holes.
- Phillips No. 1 drive offers efficient torque transfer and reduced cam-out risk during installation.
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures material safety and meets rigorous industrial standards.
Professional Applications & Engineering Value
This 2-56 UNC flat head screw is engineered to address common industrial challenges such as corrosion, high stress, and assembly efficiency. The passivated 18-8 stainless steel material provides superior resistance to rust and chemicals, extending service life in demanding settings like machinery, electronics, and outdoor equipment. Its fully threaded and coarse thread design ensures quick installation and strong retention in softer materials or pre-tapped holes, reducing the risk of stripping. The flat head with a 100° countersink sits flush to prevent snagging and maintain aerodynamic or aesthetic surfaces. Ideal for industrial screws applications requiring reliable, high-strength stainless steel fasteners that comply with strict regulatory standards.
Specification Summary & Compliance
This screw adheres to Class 2A thread fit tolerances for consistent engagement and meets ASME B18.6.3 specifications for dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The right-hand UNC coarse thread and precise manufacturing support reliable performance in various industrial fastening tasks.
