S-91771A096 3-48 x 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

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 80,000 psi ensures reliable fastening under demanding mechanical loads
• Precision Class 2A thread fit guarantees consistent engagement and reduces cross-threading risks
• 82° countersink angle provides flush mounting for clean, professional finishes
• Fully threaded design offers maximum grip length and uniform load distribution
• Phillips No. 1 drive enables efficient installation with standard tools while minimizing cam-out
• Compliance with ASME B18.6.3 and environmental regulations ensures quality assurance and safe usage

Professional Applications & Engineering Value

These 3-48 UNC flat head screws deliver exceptional engineering value in applications requiring reliable fastening with corrosion resistance. The passivated 18-8 stainless steel material provides excellent protection against oxidation and chemical exposure, making them ideal for electronics enclosures, machinery assemblies, and outdoor equipment. The coarse UNC thread ensures quick installation and secure holding power in various substrates, while the standard flat head profile with 82° countersink allows for seamless surface integration. Engineered to meet ASME B18.6.3 specifications, these screws maintain dimensional accuracy and performance consistency, reducing assembly time and maintenance costs in industrial settings.

Specification Summary & Compliance

This product features Class 2A thread fit per UNC standards, ensuring precise dimensional tolerances for reliable mating. Manufacturing complies with ASME B18.6.3 for mechanical and dimensional requirements. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free from hazardous substances. With a Rockwell B80 hardness and 80,000 psi tensile strength, they meet rigorous performance criteria for industrial fastening applications.