S-96640A284 1/4"-20 x 3/8" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Optimized thread engagement through UNC coarse threading and Class 2A fit ensures secure fastening in various materials
• Flush mounting capability with 82° countersink angle and undercut flat head profile for seamless surface integration
• Enhanced drive stability with Phillips No. 3 drive style prevents cam-out during high-torque installation
• Maximum thread coverage through fully threaded design provides consistent clamping force along entire fastener length
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global industrial use

Professional Applications & Engineering Value

These Black-Oxide 18-8 Stainless Steel flat head screws deliver critical performance advantages in demanding applications where corrosion resistance and structural integrity are paramount. The combination of 80,000 psi tensile strength and Rockwell B80 hardness ensures reliable performance in vibration-prone environments, while the Black-Oxide surface treatment provides enhanced protection against chemical exposure and atmospheric corrosion. The UNC coarse threading with Class 2A fit facilitates quick installation in machinery, electrical enclosures, and structural assemblies, reducing assembly time without compromising joint security. The 82° countersink angle and undercut head design allow for flush mounting in precision equipment, automotive components, and marine hardware, eliminating protrusions that could interfere with moving parts or aesthetic requirements.

Specification Summary & Compliance

This 1/4"-20 x 3/8" flat head Phillips screw features precision UNC coarse threading with Class 2A tolerance for consistent fit and performance. Manufactured to ASME B18.6.3 specifications with complete RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring adherence to international quality and environmental standards. The fastener maintains dimensional accuracy with 0.477" head diameter, 0.107" head height, and fully threaded design for uniform load distribution across all industrial applications.