S-91831A121 1"-12 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert technology, maintaining locking force in high-motion environments
• Excellent corrosion resistance with 18-8 stainless steel construction for long-term durability in harsh conditions
• Reliable high-temperature performance with nylon insert rated for continuous service up to 220°F
• Precise thread engagement with Class 2B fit ensuring consistent torque and secure fastening
• Easy installation and removal using standard external hex drive compatible with common tools
• Fine thread design (1"-12 UNF) providing superior clamping force and resistance to loosening
• Environmental compliance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This nylon insert locknut delivers exceptional engineering value in demanding industrial settings where vibration-induced loosening compromises assembly integrity. The 18-8 stainless steel construction provides inherent corrosion resistance, making it ideal for chemical processing, marine equipment, and food processing machinery where moisture exposure is common. The UNF fine thread configuration offers superior thread engagement compared to coarse threads, distributing load more evenly across mating components. With its external hex drive and standard profile, maintenance personnel can quickly service equipment using conventional wrenches, reducing downtime in manufacturing and heavy equipment applications. The nylon insert maintains consistent locking force without damaging mating threads, preserving component reusability while ensuring reliable performance in vibration-resistant assemblies up to the maximum 220°F temperature rating.

Specification Summary & Compliance

This locknut features Class 2B thread fit tolerance for precise engagement with UNF 1"-12 fine threads, ensuring reliable performance in industrial fastening applications. Manufactured to standard external hex drive specifications with dimensions of 1 7/16" width and 1 3/64" height. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental standards for industrial components. The right-hand thread direction and standard hex nut profile ensure compatibility with existing industrial fastener systems and tooling.