S-97190A220 1 1/4"-7 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 castellated design with 5/16" cotter pin compatibility for permanent fastening security
- Enhanced corrosion protection with zinc-plated steel construction for extended service life in harsh environments
- High-strength performance meeting Grade 5 specifications for demanding industrial applications
- Quick installation with standard external hex drive and coarse UNC threading for efficient assembly
- Precise thread engagement with Class 2B thread fit ensuring reliable connections
- Environmental compliance with REACH and RoHS 3 standards for safe industrial use
- Heavy-duty construction with 1 7/8" width providing substantial bearing surface for high-load applications
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel castle locknut delivers critical safety in high-vibration environments where conventional fasteners would loosen over time. The castellated design with 5/16" cotter pin compatibility provides positive mechanical locking that prevents rotational loosening, making it ideal for industrial machinery, automotive suspensions, agricultural equipment, and construction applications. The coarse 1 1/4"-7 UNC thread ensures rapid installation while maintaining strong holding power, while the zinc plating offers essential corrosion resistance in outdoor or chemically aggressive settings. The external hex drive allows for high-torque installation using standard tools, and the Class 2B thread fit guarantees consistent performance across multiple installations without compromising thread integrity.
Specification Summary & Compliance
This castle locknut features 1 1/4"-7 UNC coarse threading with Class 2B thread fit for precise dimensional accuracy. Manufactured to Grade 5 strength specifications with standard external hex drive profile. Compatible with 5/16" cotter pins with minimum slot depth of 0.33" and width of 0.31". Fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards for industrial use.
