S-90276A603 5/16"-18 x 5" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in demanding industrial environments
• Superior load-bearing capability with 60,000 psi tensile strength, providing reliable fastening for heavy-duty applications
• Optimized thread engagement through Class 2A thread fit and coarse UNC threading, enabling faster installation and reduced cross-threading risks
• Enhanced durability with Rockwell B69 hardness, maintaining structural integrity under repeated stress and vibration
• Secure regulatory compliance meeting ASME B18.6.3 specifications, RoHS 3, and REACH standards for global industrial use
• Versatile partial threading design allowing precise clamping force control across various material thicknesses
• User-friendly installation with standard slotted drive and rounded head profile, compatible with common hand tools

Professional Applications & Engineering Value

Engineered for industrial assembly and heavy equipment manufacturing, this 5/16"-18 UNC screw addresses critical fastening challenges through its zinc-plated steel composition and coarse thread design. The partial threading configuration prevents over-tightening in layered materials while maintaining uniform stress distribution. With 60,000 psi tensile strength and Rockwell B69 hardness, it withstands vibrational forces in machinery and structural applications. The rounded head profile distributes seating pressure evenly, reducing surface deformation in softer materials. Ideal for right-hand thread applications requiring ASME B18.6.3 compliance, this 5-inch screw delivers consistent performance in automotive, construction, and industrial maintenance scenarios where corrosion resistance and mechanical reliability are paramount.

Specification Summary & Compliance

Manufactured to Class 2A thread fit tolerances with UNC coarse threading (5/16"-18) and partial threading extending to minimum 1-1/2". Complies with ASME B18.6.3 mechanical standards, RoHS 3 (2015/863/EU) hazardous substance restrictions, and REACH (EC 1907/2006) chemical safety requirements. Dimensional accuracy maintained per inch system specifications with 0.313" thread diameter and 5" total length.