S-90585A019 0-80 x 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 industrial environments
• Precise thread engagement with Class 3A thread fit and UNF fine spacing for secure, vibration-resistant fastening
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Flush mounting capability with standard 82° countersink angle and flat head design for smooth surface finishes
• Reliable installation featuring hex drive style for secure tool engagement and reduced stripping risk
• Full thread coverage along the 3/8" length ensures maximum grip strength and load distribution
• Regulatory compliance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 316 stainless steel flat head screws provide exceptional engineering value in corrosive or high-moisture environments where fastener failure is not an option. The combination of UNF fine thread spacing and Class 3A thread fit ensures precise alignment and vibration resistance in precision assemblies, while the passivated finish enhances the natural corrosion resistance of 316 stainless steel. The 82° countersink angle and flat head profile allow for flush mounting in machinery, electronic enclosures, and marine equipment, preventing snagging while maintaining structural integrity. With full threading along the entire 3/8" length, these screws distribute clamping force evenly, making them ideal for applications requiring consistent pressure across joined materials.

Specification Summary & Compliance

This 0-80 UNF flat head screw maintains precision Class 3A thread fit tolerances with right-hand thread direction and fully threaded design. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy, including head diameter tolerance of -0.021" to 0" and standard flat head profile. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) requirements for chemical safety, ensuring suitability for global industrial markets and environmentally conscious applications.