S-91858A151 6-32 x 3/4" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh environments including marine and chemical processing
• Reliable high-strength performance with 70,000 psi tensile strength and Rockwell B80 hardness for demanding industrial applications
• Superior flush mounting thanks to the standard 82° countersink angle and flat head design, providing a smooth finished surface
• Easy installation and removal with slotted drive style, compatible with standard hand tools for quick assembly
• Consistent threading precision with UNC coarse thread and Class 2A fit, ensuring secure fastening and vibration resistance
• Enhanced durability and longevity through passivated surface finish, increasing resistance to wear and environmental factors
• Full regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH standards for quality assurance and environmental safety

Professional Applications & Engineering Value

This 316 stainless steel flat head screw is engineered to address critical challenges in industrial environments where corrosion resistance and structural integrity are paramount. The combination of UNC coarse threading and Class 2A fit provides excellent grip and vibration resistance in materials ranging from metals to plastics, while the passivated finish significantly enhances the screw's lifespan in aggressive conditions. Ideal for marine equipment, chemical processing machinery, food processing systems, and outdoor infrastructure, this fastener delivers reliable performance where moisture, chemicals, or temperature variations would compromise ordinary fasteners. The fully threaded design ensures maximum holding power across the entire engagement length, making it particularly valuable in applications requiring uniform stress distribution and tamper-resistant installations.

Specification Summary & Compliance

This flat head machine screw maintains precise dimensional accuracy with Class 2A thread fit and UNC coarse threading (6-32 size) according to ASME B18.6.3 specifications. The manufacturing process ensures consistent 82° countersink angle and proper head dimensions (0.262" diameter, 0.083" height) for flush mounting applications. Full compliance is maintained with ASME B18.6.3 for dimensional standards, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) for chemical safety regulations, ensuring both performance reliability and environmental responsibility.