S-96640A158 1/4"-20 x 1 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide coated 18-8 stainless steel, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Precise thread engagement through UNC coarse spacing and Class 2A fit, ensuring vibration resistance and secure fastening
• Optimized flush mounting with standard 82° countersink angle and flat head design for smooth surface finishes
• Enhanced driving efficiency with No. 3 Phillips drive, reducing cam-out risks during high-torque installation
• Full-threaded design providing consistent gripping power along the entire 1-1/2" length for maximum holding capacity
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global project acceptance

Professional Applications & Engineering Value

These Black-Oxide 18-8 stainless steel flat head screws deliver critical performance where corrosion resistance and structural integrity are paramount. The combination of 80,000 psi tensile strength and Rockwell B80 hardness ensures reliable performance in heavy machinery, industrial equipment, and structural assemblies subjected to dynamic loads. The fully threaded UNC coarse spacing with Class 2A fit provides superior vibration resistance, preventing loosening in high-stress applications. The 82° countersink angle and flat head profile enable seamless integration in precision applications requiring flush surface mounting, while the Black-Oxide coating enhances both corrosion protection and aesthetic appeal. These industrial screws are engineered to solve common fastening challenges in manufacturing, construction, and equipment maintenance where durability and compliance are non-negotiable.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for precision assembly. Features 1/4"-20 UNC coarse thread with right-hand direction and standard flat head profile. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The combination of dimensional accuracy and regulatory adherence makes these screws suitable for demanding applications requiring certified components.