S-92941A598 5/16"-18 x 4" ASME B18.2.1 Brass Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality brass construction, ideal for harsh industrial environments and marine applications
• Excellent machinability and conductivity due to Rockwell B55 brass material, providing reliable performance in electrical and thermal applications
• High tensile strength of 50,000 psi ensures secure fastening and long-term joint integrity under heavy loads
• Precision Class 2A thread fit guarantees consistent engagement and reduces cross-threading risks during assembly
• Optimized 7/8" minimum thread length provides sufficient engagement depth for stable connections in various materials
• External hex drive design allows for high-torque installation with standard tools and easy maintenance access
• Coarse UNC threading enables quick assembly and superior performance in softer materials and high-vibration applications

Professional Applications & Engineering Value

This 5/16"-18 UNC brass hex head screw delivers exceptional engineering value across multiple industrial sectors. The Rockwell B55 brass construction provides natural corrosion resistance without additional plating, making it ideal for marine equipment, plumbing systems, and electrical enclosures where galvanic corrosion is a concern. The coarse thread profile and partial threading design prevent material stripping in soft substrates while maintaining high pull-out strength. With 50,000 psi tensile strength and Class 2A thread fit, these fasteners ensure reliable performance in high-vibration environments like machinery, HVAC systems, and transportation equipment. The external hex drive accommodates standard wrenching tools for secure installation in confined spaces, reducing assembly time and maintenance costs.

Specification Summary & Compliance

This 4" length hex head screw features precision 5/16"-18 UNC coarse threading with Class 2A thread fit tolerance for consistent engagement. Manufacturing complies with ASME B18.2.1 dimensional standards, ensuring interchangeability and reliability. The fastener meets RoHS 3 (2015/863/EU) compliance for restricted hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety. With Rockwell B55 hardness and 50,000 psi tensile strength, this screw maintains structural integrity across demanding industrial applications while providing excellent corrosion resistance inherent to brass materials.