S-92186A563 1/4"-20 x 5 1/2" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 316 stainless steel construction, ideal for harsh chemical and marine environments
• Exceptional tensile strength of 70,000 psi ensures reliable performance under heavy loads and high-stress conditions
• Optimized for easy installation with UNC coarse threading and external hex drive that prevents cam-out and allows high torque application
• Enhanced durability with Rockwell B70 hardness that resists wear and maintains thread integrity over repeated use
• Precise thread fit with Class 2A tolerance providing consistent engagement and vibration resistance in assembled components
• Versatile partial threading design allows for both secure clamping and adjustable positioning in various industrial setups
• Full regulatory compliance with ASME B18.2.1 manufacturing standards plus RoHS 3 and REACH environmental directives

Professional Applications & Engineering Value

This 316 stainless steel hex head screw delivers critical engineering value in demanding applications where corrosion resistance and structural integrity are paramount. The UNC coarse thread configuration ensures rapid assembly in tough materials while resisting cross-threading, significantly reducing installation time in production environments. With its partially threaded design, the fastener provides both clamping force and alignment flexibility, making it ideal for machinery assembly, structural frameworks, and chemical processing equipment. The external hex drive accommodates standard tools for high-torque applications without stripping, while the 5 1/2" length offers substantial engagement depth for securing thick materials. These industrial hex bolts effectively solve common challenges of fastener failure in corrosive atmospheres, providing long-term reliability in marine, chemical processing, and outdoor infrastructure applications.

Specification Summary & Compliance

This 1/4"-20 hex head screw maintains precise Class 2A thread fit per UNC standards with coarse thread spacing for optimal performance. Manufacturing strictly follows ASME B18.2.1 specifications for dimensional accuracy and quality assurance. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and meets REACH (EC 1907/2006) requirements for chemical safety, ensuring environmental responsibility in industrial supply chains.