S-91500A628 3/8"-16 x 1 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel construction and passivated finish, ideal for harsh environments
• Exceptional tensile strength of 70,000 psi ensures reliable, long-lasting fastening in demanding applications
• Optimized thread engagement with UNC coarse spacing and Class 2A fit for quick assembly and vibration resistance
• Full threading along the entire 1 1/2" length provides maximum grip and load distribution
• Standard flat head design with 82° countersink allows for flush mounting in various materials
• Phillips drive compatibility (No. 4 size) offers familiar, efficient installation with common tools
• Compliance with major standards including ASME B18.6.3, RoHS 3, and REACH for quality assurance and environmental safety

Professional Applications & Engineering Value

This 3/8"-16 UNC flat head screw in 316 stainless steel is engineered to address critical challenges in industrial settings where corrosion and mechanical stress are prevalent. The passivated finish enhances the natural resistance of 316 stainless steel, making it suitable for marine, chemical processing, and outdoor applications exposed to moisture and chemicals. Its fully threaded coarse UNC design ensures rapid installation and superior holding power, reducing the risk of loosening under vibration. The flat head profile with an 82° countersink angle provides a smooth, flush surface, ideal for machinery, equipment assembly, and structural frameworks where protrusion is not acceptable. By meeting ASME B18.6.3 specifications, it guarantees dimensional accuracy and interoperability, streamlining maintenance and repair processes in B2B procurement scenarios.

Specification Summary & Compliance

This screw features a Class 2A thread fit for consistent assembly tolerance, with UNC coarse threading (3/8"-16) and right-hand direction. It complies with ASME B18.6.3 manufacturing standards, ensuring precise dimensions including a head diameter of 0.717" and length of 1 1/2". The product is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, confirming adherence to environmental and safety regulations for industrial use.