S-97190A180 3/4"-16 Locknuts

Key Features & Benefits at a Glance

• Secure locking mechanism with cotter pin slot prevents loosening under vibration and heavy loads, ensuring long-term joint integrity
• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh industrial environments
• High-strength Grade 5 rating provides reliable performance for demanding applications requiring robust fastening solutions
• Precision UNF fine threads with Class 2B fit ensure smooth engagement and consistent clamping force distribution
• Standard external hex drive allows for easy installation and removal using common wrench tools, reducing assembly time
• Comprehensive compatibility with 5/32" cotter pins and standardized 1-1/8" hex profile for seamless integration into existing systems
• Regulatory compliance with REACH and RoHS 3 standards ensures environmental responsibility and workplace safety

Professional Applications & Engineering Value

This Grade 5 castle locknut delivers critical vibration resistance in high-stress mechanical systems where safety is paramount. The zinc-plated steel construction provides essential corrosion protection for outdoor equipment, agricultural machinery, and automotive applications exposed to weather elements. The 3/4"-16 UNF fine threading maintains precise alignment in assemblies subject to dynamic loading, while the cotter pin locking mechanism offers fail-safe security in rotating components like axle assemblies, king pins, and steering mechanisms. Engineered with external hex drive and standardized dimensions, it enables quick maintenance and replacement without specialized tools, reducing downtime in industrial operations.

Specification Summary & Compliance

This castle locknut features 3/4"-16 UNF fine threads with Class 2B thread fit for consistent engagement accuracy. Manufacturing complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards. The Grade 5 strength classification ensures mechanical reliability, while dimensional specifications include 1-1/8" hex width, 41/64" height, and cotter pin compatibility for 5/32" diameter pins with 0.217" minimum slot depth and 0.18" minimum slot width.