S-91853A036 3/4"-10 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through cotter pin locking mechanism that prevents loosening under extreme dynamic loads
• Excellent corrosion protection with 18-8 stainless steel construction suitable for harsh industrial environments
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy assembly
• Enhanced safety and security featuring castle design with 5/32" cotter pin compatibility for critical applications
• Industry-standard compatibility with UNC coarse 3/4"-10 threads and standard hex profile for universal tool access
• Environmental compliance meeting RoHS 3 and REACH standards for responsible manufacturing
• Optimized slot dimensions with 0.25" minimum depth and 0.18" width for secure cotter pin retention

Professional Applications & Engineering Value

This 3/4"-10 UNC castle locknut delivers critical safety and reliability in demanding industrial environments where vibration-induced loosening poses significant risks. The 18-8 stainless steel construction provides exceptional corrosion resistance, making it ideal for marine equipment, agricultural machinery, and automotive applications exposed to moisture and chemicals. The external hex drive design allows for high-torque installation using standard tools, while the cotter pin locking mechanism ensures permanent fastening in critical assemblies like axle systems, steering components, and rotating machinery. The Class 2B thread fit guarantees smooth installation without compromising holding strength, reducing assembly time while maintaining vibration resistance throughout the product lifecycle.

Specification Summary & Compliance

This heavy-duty castle locknut features precise Class 2B thread fit with 3/4"-10 UNC coarse threads and right-hand orientation. Manufacturing specifications include 1-1/8" width, 13/16" height, and compatibility with 5/32" cotter pins. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe usage across various industrial sectors while meeting international quality requirements for industrial fasteners.