S-91770A071 2-56 x 3/16" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Enhanced stability and load distribution from the wide truss head design that resists pull-through
• Secure and efficient installation with No. 1 Phillips drive and fully threaded 2-56 UNC coarse thread design
• Precise thread engagement with Class 2A thread fit ensuring consistent assembly quality
• Broad regulatory compliance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
• Versatile industrial compatibility with right-hand threading and standard 3/16" length for diverse applications

Professional Applications & Engineering Value

These 2-56 UNC rounded truss head Phillips screws deliver critical engineering solutions for industrial applications requiring both mechanical reliability and corrosion protection. The passivated 18-8 stainless steel construction provides exceptional resistance to oxidation and chemical exposure, making them ideal for electronics enclosures, machinery assemblies, and outdoor equipment where environmental factors threaten fastener integrity. The wide truss head design significantly increases bearing surface area, preventing surface damage and maintaining seal integrity in sheet metal and plastic components. Combined with the No. 1 Phillips drive and coarse threading, these screws enable rapid installation while maintaining vibration resistance in high-stress environments. The fully threaded configuration ensures maximum engagement depth, providing superior holding power across various material thicknesses commonly encountered in manufacturing and maintenance operations.

Specification Summary & Compliance

These rounded head screws feature precise Class 2A thread fit with 2-56 UNC coarse threads and dimensional accuracy per ASME B18.6.3 specifications. The manufacturing process ensures consistent 0.194" head diameter and 3/16" length tolerances. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations is verified, confirming the absence of restricted substances. The passivated surface treatment on 18-8 stainless steel provides additional corrosion protection while maintaining the material's inherent strength characteristics of 70,000 psi tensile strength and Rockwell B70 hardness.