S-96640A150 1/4"-20 x 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and black-oxide coating for reliable performance in harsh industrial environments
• Superior holding power with 80,000 psi tensile strength and Rockwell B80 hardness to withstand high-stress applications
• Precise thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
• Streamlined installation featuring a standard 82° countersink angle and No. 3 Phillips drive for flush mounting and efficient assembly
• Full-thread design providing maximum grip length and uniform load distribution across the entire fastener
• Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Optimized head geometry with 0.477" diameter and 0.153" height for consistent seating in countersunk applications

Professional Applications & Engineering Value

These 1/4"-20 UNC flat head Phillips screws deliver critical engineering advantages for industrial applications where corrosion resistance, structural integrity, and regulatory compliance are paramount. The black-oxide coated 18-8 stainless steel construction provides superior protection against oxidation and chemical exposure, making these fasteners ideal for machinery, electrical enclosures, and outdoor equipment. The combination of 80,000 psi tensile strength and Class 2A thread fit ensures reliable performance in vibration-prone environments, while the 82° countersink angle and fully threaded design facilitate precise installation and maximum clamping force. These industrial flat head screws solve common fastening challenges by maintaining dimensional stability under load while meeting stringent industry standards for quality and environmental safety.

Specification Summary & Compliance

Manufactured to precise dimensional tolerances with Class 2A thread fit and UNC coarse threading (1/4"-20). Complies with ASME B18.6.3 manufacturing specifications for flat head screws. Meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety. Features standard 82° countersink angle and fully threaded design with right-hand thread direction.