S-97190A010 5/16"-18 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through cotter pin locking mechanism that prevents loosening under extreme conditions
- Enhanced corrosion protection with zinc plating that extends service life in demanding industrial environments
- Heavy-duty performance guaranteed by Grade 5 steel construction with high tensile strength
- Reliable installation and removal with standard external hex drive design for common tool compatibility
- Precise thread engagement with UNC coarse threading and Class 2B fit for secure fastening
- Environmental compliance assurance meeting both REACH and RoHS 3 standards for safe industrial use
- Optimized slot dimensions (0.078" depth, 0.09" width) for secure cotter pin retention
Professional Applications & Engineering Value
This Grade 5 castle locknut delivers critical safety and reliability in applications where vibration-induced loosening poses significant risks. The zinc-plated steel construction provides essential corrosion resistance for outdoor equipment, agricultural machinery, and automotive assemblies. The UNC coarse threading ensures quick installation and superior holding power in high-stress environments, while the cotter pin locking mechanism creates a permanent, vibration-proof connection that eliminates the need for frequent retightening. Engineered for industrial applications requiring fail-safe fastening, this castle locknut maintains integrity in rotating assemblies, axle systems, and machinery where safety-critical connections cannot compromise.
Specification Summary & Compliance
This castle locknut features 5/16"-18 UNC coarse threading with Class 2B thread fit for precise engagement. Manufactured from Grade 5 steel with dimensions of 1/2" width and 17/64" height, it accommodates 5/64" cotter pins. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring safe use across various industrial sectors while meeting rigorous quality and safety requirements.
