S-91771A104 2-56 x 1/4" 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 fastening under significant mechanical stress
- Precise Class 2A thread fit guarantees smooth installation and secure connections in assembly operations
- Standard 82° countersink angle allows for flush mounting, reducing snag hazards and improving aesthetics
- Rockwell B80 hardness provides excellent durability and resistance to wear over repeated use
- Fully threaded design offers maximum grip length for versatile applications in various material thicknesses
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures safety, reliability, and environmental responsibility
Professional Applications & Engineering Value
These 2-56 UNC flat head Phillips machine screws are engineered to address common industrial challenges, such as vibration loosening and corrosion in demanding settings. Made from passivated 18-8 stainless steel, they provide superior resistance to rust and chemicals, extending service life in applications like electronics assembly, machinery, and automotive components. The coarse UNC thread and Class 2A fit ensure quick, secure fastening with minimal risk of cross-threading, while the flat head design with an 82° countersink angle allows for seamless integration into surfaces, reducing protrusion and improving safety. Ideal for industrial fasteners requiring high strength and regulatory compliance, these screws deliver consistent performance in precision-driven environments.
Specification Summary & Compliance
This product features a 2-56 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy, ensuring reliable engagement in various materials. It is manufactured in accordance with ASME B18.6.3 standards and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety requirements for industrial use.
