S-91831A147 3/4"-10 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision-engineered nylon insert that maintains locking force under dynamic loads
• Excellent corrosion protection with 18-8 stainless steel construction for extended service life in harsh environments
• Reliable reusability allowing multiple installations without compromising locking performance
• High-temperature capability with nylon insert rated for continuous operation up to 220°F (104°C)
• Precise thread engagement with UNC coarse threads and Class 2B fit ensuring smooth installation and secure fastening
• Industry-standard compatibility with standard 1-1/16" hex profile for easy installation using common tools
• Environmental compliance meeting RoHS 3 and REACH standards for global manufacturing applications

Professional Applications & Engineering Value

This nylon insert locknut delivers critical vibration resistance in demanding industrial environments where reliable locking performance is essential. The 18-8 stainless steel construction provides exceptional corrosion resistance, making it ideal for applications exposed to moisture, chemicals, or outdoor conditions. The UNC coarse threads with Class 2B fit ensure quick installation and secure fastening in heavy machinery, automotive assemblies, and structural frameworks. The nylon insert creates consistent friction that prevents loosening under continuous vibration, while maintaining reusability for maintenance and repair operations. With a maximum temperature rating of 220°F, this locknut performs reliably in elevated temperature applications common in manufacturing equipment, transportation systems, and industrial processing facilities.

Specification Summary & Compliance

This locknut features 3/4"-10 UNC coarse threads with Class 2B thread fit for precise dimensional accuracy and reliable engagement. The external hex drive style with standard profile (1-1/16" width, 7/8" height) ensures compatibility with standard wrenching tools. Manufactured from 18-8 stainless steel with nylon insert locking mechanism, the product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, making it suitable for global industrial applications requiring regulatory compliance.