S-91500A912 1/4"-20 x 3/4" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments and chemical exposure
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B80 hardness for reliable performance under heavy loads
• Optimized drive engagement featuring Phillips No. 3 drive for secure installation and reduced cam-out during high-torque applications
• Precision thread fit with Class 2A UNC coarse threads ensuring consistent engagement and vibration resistance
• Flush mounting capability with undercut flat head design and 82° countersink angle for seamless surface integration
• Full thread coverage along the entire 3/4" length provides maximum holding power and adjustment flexibility
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 316 stainless steel flat head screws deliver critical performance advantages in demanding industrial environments where corrosion resistance and structural integrity are paramount. The combination of fully threaded UNC coarse threads and Class 2A fit ensures reliable fastening in vibration-prone applications while maintaining precise dimensional accuracy. The undercut flat head profile with 82° countersink angle provides flush mounting for safety-critical applications and aesthetic requirements. Particularly valuable in marine, chemical processing, and food equipment applications, these Phillips drive screws offer superior tensile strength (70,000 psi) for structural assemblies while the passivated finish enhances surface durability. Engineered to withstand aggressive environments, they prevent galvanic corrosion and maintain performance in temperature-variable conditions common in industrial machinery and outdoor installations.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerance for consistent performance. Features 1/4"-20 UNC coarse threads with right-hand orientation and full threading along the 3/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries. The 316 stainless steel composition with passivated finish provides enhanced corrosion protection while maintaining mechanical properties including Rockwell B80 hardness and 70,000 psi tensile strength.