S-91783A587 5/16"-18 x 1 1/2" ASME B18.6.3 Stainless Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable, long-lasting fastening
• Easy installation and removal thanks to the slotted drive design and rounded head profile
• Optimized thread engagement with UNC coarse threading and Class 2A fit, ensuring secure connections in various materials
• Full thread coverage along the 1-1/2" length for maximum grip and adjustment flexibility
• Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for safe, quality-controlled usage
• Wide industrial applicability due to right-hand threading and standardized dimensions for versatile assembly needs

Professional Applications & Engineering Value

This 18-8 stainless steel slotted rounded head screw is engineered to address common industrial challenges such as corrosion-induced failure and mechanical stress. The passivated finish significantly enhances its resistance to oxidation and chemical exposure, making it suitable for outdoor equipment, marine hardware, and chemical processing installations. Its UNC coarse threads and Class 2A thread fit provide quick assembly and reliable holding power in soft metals, plastics, and wood, reducing installation time and minimizing strip-out risks. With a 100,000 psi tensile strength, it ensures structural integrity in high-vibration environments like machinery frames, conveyor systems, and automotive assemblies, offering engineers a dependable fully threaded fastener that combines durability with regulatory adherence.

Specification Summary & Compliance

This screw maintains precise Class 2A thread fit per UNC standards, with a diameter of 0.313" and coarse thread spacing for consistent performance. Manufacturing follows ASME B18.6.3 specifications, ensuring dimensional accuracy and mechanical reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for safe use in global industrial markets.