S-91771A085 2-56 x 7/8" 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
- Superior corrosion resistance with passivated 18-8 stainless steel construction for extended service life in harsh environments
- High tensile strength of 80,000 psi ensures reliable fastening under substantial mechanical loads
- Rockwell B80 hardness provides excellent durability and resistance to wear during installation and use
- Class 2A thread fit offers optimal assembly clearance while maintaining secure connections
- Phillips drive design enables efficient installation with standard tools, reducing assembly time
- Full threading along the 7/8" length allows for maximum grip and adjustment flexibility
- Compliance with major industry standards including ASME B18.6.3 ensures consistent quality and performance
Professional Applications & Engineering Value
These 2-56 UNC flat head screws deliver exceptional engineering value for industrial applications requiring reliable fastening solutions. The passivated 18-8 stainless steel construction provides outstanding corrosion resistance, making them ideal for environments exposed to moisture, chemicals, or outdoor conditions. The coarse UNC thread pattern combined with Class 2A thread fit ensures quick assembly and secure fastening in various materials, reducing the risk of cross-threading. The flat head profile with 82° countersink angle creates a flush surface finish, essential for applications where protrusions are unacceptable. These screws are particularly valuable in electronics assembly, machinery manufacturing, and precision equipment where Phillips drive compatibility and consistent performance are critical for production efficiency.
Specification Summary & Compliance
This 2-56 UNC flat head screw features precise dimensional accuracy with Class 2A thread fit per ASME standards, ensuring consistent performance across applications. The manufacturing process strictly adheres to ASME B18.6.3 specifications for dimensional requirements and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations concerning chemical safety, making them suitable for global industrial markets with strict environmental requirements.
