S-92800A272 9/16"-18 x 4" 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and reducing maintenance costs
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high-stress conditions
• Precise thread engagement with Class 2A fit and UNF fine thread (9/16"-18) ensuring vibration resistance and secure fastening
• Optimized load distribution through partial threading design, minimizing stress concentration and material fatigue
• Efficient installation and removal with external hex drive and 13/16" head width, compatible with standard tools for reduced assembly time
• Regulatory compliance assurance meeting RoHS 3 and REACH standards, supporting global supply chain requirements
• Dimensional stability with a 4" length and 1 3/8" minimum thread length, providing consistent performance in inch-system applications

Professional Applications & Engineering Value

This 9/16"-18 UNF hex head screw delivers critical engineering value in demanding industrial applications where fastener failure is not an option. Constructed from 18-8 stainless steel, it resists corrosion in chemical processing, marine, and outdoor equipment, addressing common failure points in standard fasteners. The UNF fine thread and Class 2A thread fit provide superior vibration resistance in machinery, automotive assemblies, and structural frameworks, preventing loosening under dynamic loads. With partial threading, it concentrates clamping force precisely where needed, reducing weight without compromising the 80,000 psi tensile strength. The external hex drive enables high-torque installation, making it ideal for maintenance-heavy environments where reliability and quick serviceability are paramount.

Specification Summary & Compliance

This screw maintains Class 2A thread fit per UNF standards with a thread size of 9/16"-18 and fine thread spacing. Manufacturing adheres to inch system dimensions, including a 4" length and 0.5625" thread diameter. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for industrial use.