S-90273A437 3/8"-16 x 5/8" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Exceptional holding power with 60,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
• Precise flush installation with standard 82° countersink angle and flat head design for smooth surface finishing
• Quick assembly efficiency through coarse UNC threading and Class 2A fit, reducing installation time and labor costs
• Secure drive engagement with No. 4 Phillips drive style, minimizing cam-out risks during high-torque applications
• Full-threaded reliability ensuring maximum grip along the entire 5/8" length for enhanced fastening integrity
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global project acceptance

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head screws deliver critical engineering solutions where surface flushness and structural integrity are paramount. The zinc-plated steel construction provides essential corrosion protection for machinery, automotive assemblies, and outdoor equipment exposed to harsh conditions. The coarse thread design enables rapid installation in wood, metal, and composite materials while resisting vibration-induced loosening. With full threading and Class 2A fit, these Phillips drive screws maintain consistent clamping force across the entire fastener length, preventing joint failure in high-stress applications. The standardized 82° countersink angle ensures seamless integration with common chamfered holes, eliminating protrusions that could interfere with moving components or safety requirements.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerances ensuring interchangeability and reliable performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances. Features UNC coarse threads with right-hand direction, 0.375" diameter, and 5/8" length for standardized industrial applications.