S-93126A190 1 3/8"-12 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the nylon insert locking mechanism that maintains secure fastening under dynamic loads
• Enhanced durability in high-temperature environments with nylon insert rated for continuous operation up to 250°F
• Optimal space-saving design with extra-wide thin profile providing maximum clamping force in confined applications
• Reliable thread engagement with Class 2B thread fit ensuring precise mating with male threads
• Exceptional strength performance meeting ASTM Grade C specifications for demanding industrial applications
• Easy installation and removal with standard external hex drive compatible with common wrench tools
• Environmental compliance assurance meeting both REACH and RoHS 3 regulations for global market acceptance

Professional Applications & Engineering Value

This 1 3/8"-12 UNF nylon insert lock nut delivers critical vibration resistance in demanding industrial environments where loosening under dynamic loads poses significant safety risks. The extra-wide thin profile provides substantial bearing surface while maintaining a low-profile design, ideal for space-constrained assemblies in heavy machinery, automotive systems, and industrial equipment. The ASTM Grade C steel construction ensures mechanical integrity under high stress conditions, while the fine UNF threads offer superior resistance to vibrational loosening compared to coarse thread alternatives. The nylon insert creates consistent locking torque without damaging mating threads, making it suitable for applications requiring repeated disassembly and reassembly. This combination of features makes it particularly valuable in industrial applications where reliability and maintenance accessibility are paramount considerations.

Specification Summary & Compliance

This locknut features 1 3/8"-12 UNF fine threads with Class 2B thread fit for precise dimensional accuracy and reliable mating compatibility. The right-hand thread direction follows standard industrial conventions for straightforward installation. Manufacturing and material specifications comply with ASTM Grade C strength requirements, ensuring consistent performance across production batches. The product fully meets REACH (EC 1907/2006) compliance standards and RoHS 3 (2015/863/EU) directives, confirming environmental responsibility and regulatory acceptance for international industrial markets.