S-91500A540 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, ideal for harsh chemical and marine environments
• Enhanced durability and longevity from passivated surface finish that improves corrosion protection
• Reliable fastening performance with 70,000 psi tensile strength and Rockwell B80 hardness
• Easy installation and removal through Phillips No. 3 drive design with standard flat head profile
• Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fit
• Flush mounting capability with 82° countersink angle for smooth surface finishing
• Full regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

These 316 stainless steel flat head screws deliver exceptional performance in demanding industrial settings where corrosion resistance is critical. The combination of passivated finish and marine-grade stainless steel provides superior protection against chemical exposure, saltwater environments, and industrial contaminants. The fully threaded UNC coarse thread design ensures maximum holding power in various materials, while the 82° countersink angle allows for flush installation in precision applications. These Phillips drive flat head screws are engineered for machinery assembly, marine equipment, chemical processing systems, and food processing applications where reliability and regulatory compliance are essential. The 1/4"-20 thread size with Class 2A fit guarantees consistent performance across multiple installations.

Specification Summary & Compliance

This 3/4" length flat head screw features precise Class 2A thread fit with UNC coarse threading (1/4"-20) and right-hand thread direction. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance standards. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting current environmental regulations for industrial use. Mechanical properties include 70,000 psi tensile strength and Rockwell B80 hardness, ensuring reliable performance in demanding applications.