S-97135A414 1/4"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking that maintains secure fastening even under intense dynamic loads
• Exceptional strength and durability with Grade 8 steel construction, ensuring reliable performance in demanding industrial applications
• Enhanced corrosion protection from black-oxide surface treatment, extending service life in various environmental conditions
• High-temperature capability with nylon insert rated to 220°F, maintaining locking integrity in elevated temperature environments
• Precision threading compatibility with UNC coarse 1/4"-20 threads and Class 2B fit for smooth installation and consistent engagement
• Easy installation and removal using standard external hex drive design with 7/16" width for common tool compatibility
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for use in regulated industrial sectors

Professional Applications & Engineering Value

This Grade 8 nylon insert lock nut delivers critical vibration resistance for machinery, automotive, and heavy equipment applications where loosening under dynamic loads poses significant safety risks. The black-oxide steel construction provides essential corrosion protection while maintaining the high tensile strength required for structural fastening. The UNC coarse threading with Class 2B fit ensures reliable engagement with mating components, reducing cross-threading incidents during assembly. With temperature resistance up to 220°F, this external hex locknut maintains its locking capability in engine compartments, industrial motors, and power transmission systems where thermal cycling is common. The combination of nylon insert locking technology and premium material grade addresses the fundamental challenge of maintaining bolt preload in high-vibration environments, preventing costly downtime and potential equipment failure.

Specification Summary & Compliance

This locknut features precision 1/4"-20 UNC coarse threads with Class 2B thread fit for consistent mating with standard fasteners. Manufactured from high-strength Grade 8 steel with black-oxide finish, it provides dimensional accuracy per industry standards. The external hex design measures 7/16" across flats with 5/16" height for standard tool compatibility. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and suitability for global industrial applications requiring certified components.