S-90831A210 5/8"-18 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 316 Stainless Steel finish, ideal for harsh environments and extended service life
• Space-saving thin profile (3/8" height) allows for use in confined assemblies without compromising strength
• Precise Class 2B thread fit ensures smooth engagement and reliable clamping force in critical applications
• Fine UNF thread design (5/8"-18) provides increased adjustability and vibration resistance compared to coarse threads
• External hex drive compatibility enables quick installation with standard wrenching tools
• Full regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries
• Optimized 15/16" width offers excellent torque transmission and prevents rounding during installation

Professional Applications & Engineering Value

This 5/8"-18 UNF thin hex nut delivers exceptional engineering value through its Black-Oxide 316 Stainless Steel construction, specifically engineered to combat corrosion in demanding industrial environments. The fine thread spacing and Class 2B thread fit provide superior vibration resistance and precise tension control in machinery, automotive, and marine applications where reliability is critical. The thin hex nut profile solves space constraints in compact assemblies while maintaining full external hex drive functionality for easy installation. This combination of corrosion-resistant properties and precision threading makes it ideal for applications requiring repeated disassembly and reassembly without performance degradation.

Specification Summary & Compliance

Manufactured to UNF thread standards with Class 2B thread fit tolerance for consistent performance. Dimensions include 5/8"-18 thread size, 15/16" width across flats, and 3/8" height. This hex nut is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting the latest environmental and safety regulations for industrial components.