S-90099A030 5/16"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision-engineered nylon insert that maintains locking force under dynamic loads
• Enhanced torque application capability with extra wide hex profile for improved tool engagement and reduced slipping
• Reliable high-temperature performance with nylon insert rated for continuous service up to 250°F (121°C)
• Excellent corrosion resistance provided by 18-8 stainless steel construction for demanding industrial environments
• Consistent thread engagement ensured by Class 2B thread fit for reliable assembly and disassembly cycles
• Industry-standard compatibility with UNC coarse 5/16"-18 threads for broad application across equipment and machinery
• Environmental compliance assurance meeting both RoHS 3 and REACH regulations for global manufacturing requirements

Professional Applications & Engineering Value

This nylon insert lock nut delivers critical vibration resistance in demanding industrial applications where secure fastening is paramount. The 18-8 stainless steel construction provides exceptional corrosion resistance for harsh environments, while the extra wide hex profile enables higher torque application without tool slippage during installation. The UNC coarse thread design ensures quick assembly and reliable performance in machinery, automotive, and construction equipment where vibration-resistant fasteners are essential. The nylon insert maintains consistent locking force across temperature variations up to 250°F, making it ideal for engines, motors, and industrial machinery subject to thermal cycling and dynamic loads.

Specification Summary & Compliance

This locknut features 5/16"-18 UNC coarse threads with Class 2B thread fit for precision engagement and reliable performance. The external hex drive with extra wide profile (9/16" width) provides superior torque transmission. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance. The right-hand thread direction and 7/16" height provide standardized installation compatibility across industrial applications.