S-90275A634 3/8"-16 x 2 1/2" ASME B18.6.3 Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated steel construction for long-lasting performance in harsh industrial environments
• Superior holding power with 60,000 psi tensile strength and Rockwell B70 hardness for reliable fastening in demanding applications
• Precision thread engagement with Class 2A thread fit ensuring smooth installation and consistent performance
• Optimal flush mounting with 82° countersink angle and standard flat head profile for seamless surface finishing
• Enhanced installation efficiency with coarse UNC threading providing faster assembly and reduced cross-threading risk
• Full-threaded design offering maximum grip length and uniform load distribution across the entire fastener
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global supply chain compatibility

Professional Applications & Engineering Value

Our 3/8"-16 UNC flat head screws deliver critical engineering solutions where surface flushness and high tensile strength are paramount. The zinc-plated steel construction provides essential corrosion protection for machinery, equipment frames, and structural assemblies exposed to industrial atmospheres. The coarse UNC threading ensures rapid installation in production environments while maintaining vibration resistance. With full threading and 82° countersink angle, these screws achieve perfect flush mounting in metal fabrication, automotive components, and heavy equipment manufacturing. The slotted drive accommodates both manual and automated installation processes, making them versatile for maintenance and assembly line applications where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerances for precision engagement. Features 3/8"-16 UNC coarse threads with right-hand orientation and full threading along the 2 1/2" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The zinc-plated surface treatment meets industrial corrosion protection standards while maintaining the specified mechanical properties of 60,000 psi tensile strength and Rockwell B70 hardness.