S-90585A062 3/8"-16 x 1 3/8" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh chemical and marine environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under high stress
• Precise thread engagement with Class 3A fit and UNC coarse threads ensuring vibration resistance and secure fastening
• Efficient installation with 7/32" hex drive providing positive torque transmission and reduced cam-out risk
• Flush surface finish with standard 82° countersink angle allowing for clean, recessed installation in precision applications
• Full threading capability enabling maximum grip length and uniform load distribution across the entire fastener
• Regulatory compliance assurance meeting ASME B18.3 manufacturing standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 316 stainless steel flat head screws deliver exceptional performance where corrosion resistance and structural integrity are paramount. The passivated finish significantly enhances surface durability against chemical exposure and oxidation, while the Class 3A thread fit with UNC coarse spacing provides superior vibration resistance in high-stress applications. The combination of 70,000 psi tensile strength and hex drive design ensures reliable fastening in machinery, marine equipment, and chemical processing systems where fastener failure is not an option. These fully threaded screws with standardized 82° countersink profile offer seamless integration in precision assemblies requiring flush surface mounting.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread tolerance for precision fit. Features include 3/8"-16 UNC coarse threads, right-hand threading direction, and full threading along the 1-3/8" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries. The 316 stainless steel composition with passivated surface treatment meets industrial requirements for corrosion resistance and mechanical performance.