S-96653A258 1/4"-20 x 1" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with PTFE-coated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Optimized flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
• Enhanced driving efficiency through No. 3 Phillips drive style, reducing cam-out risks during installation
• Precision thread engagement with Class 2A thread fit and coarse 1/4"-20 UNC threading for secure fastening
• Full-threaded design ensures maximum grip length and uniform stress distribution across applications
• Regulatory compliance meets ASME B18.6.3 standards and environmental regulations (RoHS 3, REACH) for global supply chain compatibility

Professional Applications & Engineering Value

Engineered for demanding industrial fastening scenarios, these PTFE-coated 18-8 stainless steel flat head screws address critical challenges like chemical exposure, vibration loosening, and assembly efficiency. The fully threaded UNC coarse thread design provides rapid installation and robust holding power in metals, plastics, and composite materials, while the 82° countersink angle ensures flush seating without protrusions—essential for machinery, enclosures, and automotive components where surface integrity matters. The Phillips drive offers familiar, tool-compatible installation, reducing operator fatigue in high-volume production environments. Combined with 80,000 psi tensile strength, these screws deliver long-term reliability in structural and non-structural industrial applications.

Specification Summary & Compliance

This 1/4"-20 UNC flat head screw maintains Class 2A thread fit tolerances per ASME B18.6.3 specifications, ensuring consistent dimensional accuracy. Manufacturing adheres to ASME B18.6.3 standards for drive geometry, head profile, and thread form. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances for safe use in regulated markets.