S-91772A078 2-56 x 5/16" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan Head Phillips 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 industrial environments
- High tensile strength of 70,000 psi ensures reliable fastening under demanding mechanical loads
- Rockwell B70 hardness provides excellent durability and resistance to wear and deformation
- Class 2A thread fit offers consistent, reliable engagement with standard UNC nuts and threaded holes
- Fully threaded design maximizes grip length and holding power across the entire screw length
- Phillips No. 1 drive enables efficient installation with common tools while minimizing cam-out
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality, safety, and environmental responsibility
Professional Applications & Engineering Value
These 2-56 UNC pan head screws deliver exceptional performance in precision assembly applications where corrosion resistance and mechanical reliability are critical. The passivated 18-8 stainless steel construction provides superior protection against oxidation and chemical exposure, making them ideal for electronics enclosures, medical devices, marine equipment, and food processing machinery. The combination of 70,000 psi tensile strength and Rockwell B70 hardness ensures these fasteners maintain clamp load integrity in vibrating environments. The coarse UNC thread with Class 2A fit provides quick assembly with reduced cross-threading risk, while the pan head design with Phillips drive offers a low-profile solution for space-constrained applications requiring reliable torque transmission.
Specification Summary & Compliance
These industrial fasteners feature precision 2-56 UNC coarse threads with Class 2A thread fit tolerance for consistent performance. Manufacturing complies with ASME B18.6.3 specifications ensuring dimensional accuracy and interchangeability. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances. With a length of 5/16" and complete threading, these screws deliver reliable fastening performance across various industrial applications.
