S-91771A074 2-56 x 1/8" 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, ideal for harsh environments and long-term reliability.
- High tensile strength of 80,000 PSI ensures secure, durable fastening in demanding industrial applications.
- Precise Class 2A thread fit for easy assembly and consistent performance with UNC coarse threads.
- Undercut flat head design with an 82° countersink angle for flush mounting and reduced risk of snagging.
- Phillips drive (No. 1 size) provides efficient installation with common tools, minimizing slippage.
- Full threading and right-hand direction offer uniform load distribution and straightforward tightening.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards.
Professional Applications & Engineering Value
These 2-56 UNC flat head screws are engineered to address common challenges in precision assemblies, such as vibration loosening and corrosion-induced failure. Made from passivated 18-8 stainless steel, they provide superior resistance to moisture and chemicals, extending service life in electronics, machinery, and automotive components. The flat head with undercut profile and 82° countersink angle ensures a seamless fit, reducing protrusion and improving aerodynamics or aesthetics. With a coarse thread and Class 2A fit, they facilitate quick installation and maintain grip under stress, making them ideal for applications requiring reliable, high-strength fastening without frequent maintenance.
Specification Summary & Compliance
This screw adheres to ASME B18.6.3 standards, with precise dimensions including a 1/8" length, 2-56 UNC coarse threads, and Class 2A thread fit for consistent tolerance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring no hazardous substances, and features a Rockwell B80 hardness and 80,000 PSI tensile strength for dependable performance in industrial settings.
