S-91099A101 2-56 x 3/16" 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 and resistance to mechanical stress in demanding applications.
- Precise Class 2A thread fit provides consistent engagement and reduces the risk of cross-threading during installation.
- 82° undercut flat head design allows for a flush, low-profile finish that enhances aesthetics and prevents snagging.
- Phillips drive (No. 1 size) offers widespread tool compatibility and efficient installation with common drivers.
- Fully threaded coarse (UNC) design maximizes grip and holding power across the entire fastener length.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
Engineered for precision and durability, these 2-56 UNC flat head screws in passivated 18-8 stainless steel address critical industrial needs by combining high corrosion resistance with robust mechanical properties. The fully threaded coarse thread and Class 2A fit ensure reliable performance in applications such as electronics assembly, machinery, and automotive components, where vibration resistance and consistent clamping force are essential. The undercut flat head with an 82° countersink angle provides a seamless finish, reducing protrusion and improving safety in tight spaces. Ideal for industrial fastening in corrosive or high-stress environments, these screws deliver long-term reliability and compliance with stringent ASME B18.6.3 standards.
Specification Summary & Compliance
This screw features a 2-56 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy, and is manufactured from 18-8 stainless steel with a passivated surface treatment. It meets ASME B18.6.3 specifications for dimensional and mechanical requirements, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.
