S-97135A425 9/16"-12 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision-engineered nylon insert that maintains locking force under dynamic loads
• Exceptional strength performance with Grade 8 classification, ensuring reliable performance in heavy-duty applications
• Enhanced corrosion protection from black-oxide steel coating, extending service life in demanding environments
• High-temperature compatibility with nylon insert rated to 220°F, maintaining locking integrity in thermal cycling conditions
• Optimal thread engagement with UNC coarse thread profile and Class 2B fit, providing smooth installation and secure fastening
• Industry-standard compatibility with 7/8" external hex drive, enabling use with standard tools and reducing installation time
• Regulatory compliance assurance meeting REACH and RoHS 3 standards for global industrial applications

Professional Applications & Engineering Value

This Grade 8 black-oxide steel nylon insert locknut delivers critical vibration resistance in demanding industrial environments where constant motion and dynamic loads compromise fastener integrity. The precision UNC coarse thread configuration ensures rapid installation while maintaining Class 2B thread fit tolerances for consistent clamping force. Engineered with a temperature-resistant nylon insert rated to 220°F, this external hex locknut prevents loosening in applications experiencing thermal cycling, from heavy machinery and automotive assemblies to construction equipment and industrial manufacturing systems. The black-oxide coating provides essential corrosion protection, extending service life in environments where moisture and chemicals are present, while the 9/16"-12 thread size offers optimal strength-to-weight ratio for structural connections requiring reliable, long-term performance.

Specification Summary & Compliance

This heavy-duty locknut features precision UNC coarse threads with Class 2B thread fit tolerances, ensuring consistent engagement and reliable performance. Manufactured from high-strength steel with black-oxide surface treatment, the fastener meets Grade 8 strength classification requirements. The component is fully compliant with REACH (EC 1907/2006) regulations and RoHS 3 (2015/863/EU) directives, confirming environmental responsibility and material safety for industrial applications worldwide.