S-95030A390 1 3/4"-5 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
- Secure Cotter Pin Locking - Prevents loosening under extreme vibration and dynamic loads, ensuring long-term fastening reliability
- Heavy-Duty Zinc-Plated Steel Construction - Provides excellent corrosion resistance and durability in demanding industrial environments
- Standard UNC Coarse Threading - Enables quick installation and removal while maintaining strong holding power
- Class 2B Thread Fit - Ensures precise thread engagement and consistent performance across applications
- External Hex Drive Design - Allows for standard wrench access and high torque application capability
- REACH & RoHS 3 Compliance - Meets international environmental standards for safe industrial use
- Optimized Slot Dimensions - Accommodates standard 3/8" cotter pins for reliable positive locking
Professional Applications & Engineering Value
This heavy-duty castle locknut with cotter pin locking mechanism addresses critical safety concerns in high-vibration industrial applications. The zinc-plated steel construction provides superior corrosion protection while maintaining the structural integrity needed for heavy machinery, agricultural equipment, and automotive assemblies. The 1 3/4"-5 UNC coarse thread design ensures rapid installation without compromising holding strength, making it ideal for maintenance operations where downtime reduction is crucial. The external hex drive allows for high-torque application using standard tools, while the precisely machined slots accommodate 3/8" cotter pins to create a positive mechanical lock that prevents catastrophic failure in rotating assemblies and structural connections.
Specification Summary & Compliance
This castle locknut features Class 2B thread fit per UNC standards with coarse thread spacing for optimal performance. Manufacturing specifications include a width of 2 5/8", height of 1 1/2", and cotter pin slot dimensions of 0.44" minimum depth and 0.43" minimum width. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring safe use across industrial sectors while meeting international quality standards for heavy-duty locking fasteners.
