S-97135A426 9/16"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking that maintains secure fastening in high-motion environments
• Exceptional strength and durability with Grade 8 steel construction for heavy-duty industrial applications
• Reliable high-temperature performance with nylon insert rated to 220°F (104°C) without compromising locking capability
• Precise thread engagement with UNF fine threading and Class 2B fit ensuring consistent, accurate installation
• Enhanced corrosion protection through black-oxide steel finish extending service life in demanding conditions
• Easy installation and removal with standard external hex drive design compatible with common tools
• Compliance with international standards including REACH and RoHS 3 for global industrial applications

Professional Applications & Engineering Value

This Grade 8 nylon insert locknut delivers critical vibration resistance in demanding industrial environments where fastener loosening can compromise system integrity. The black-oxide steel construction provides superior corrosion protection while maintaining the high tensile strength required for heavy machinery, automotive assemblies, and industrial equipment. The precision 9/16"-18 UNF fine threading with Class 2B fit ensures consistent torque values and reliable performance in applications subject to constant motion or thermal cycling. The nylon insert locking mechanism maintains its effectiveness up to 220°F, making it ideal for engine components, power transmission systems, and manufacturing equipment where temperature fluctuations and vibration are constant challenges. This combination of materials and engineering addresses the critical need for fasteners that won't back out under stress while providing long-term reliability.

Specification Summary & Compliance

This locknut features precision 9/16"-18 UNF fine threading with Class 2B thread fit for consistent engagement and reliable performance. Manufactured from high-strength Grade 8 steel with black-oxide finish, it meets rigorous industrial standards. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring environmental responsibility and global market acceptance. Dimensions include 7/8" width and 41/64" height with right-hand thread direction and external hex drive configuration.