S-91831A041 1 1/2"-6 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking that maintains secure fastening in high-motion environments
• Excellent corrosion resistance with 18-8 stainless steel construction for long service life in harsh conditions
• High-temperature capability with nylon insert rated up to 220°F for reliable performance in thermal applications
• Precise thread engagement with Class 2B thread fit ensuring smooth installation and consistent clamping force
• Easy installation and removal using standard wrench tools thanks to the external hex drive design
• Coarse thread advantage with UNC 1 1/2"-6 specification providing quick assembly and reduced cross-threading risk
• Regulatory compliance assurance 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 environments where vibration loosening poses significant reliability concerns. The 18-8 stainless steel construction provides inherent corrosion resistance, making it ideal for outdoor equipment, marine applications, and chemical processing facilities where moisture and corrosive elements are present. The UNC coarse thread configuration with Class 2B thread fit ensures rapid installation while maintaining precise tolerances, reducing assembly time in high-volume manufacturing operations. The nylon locking insert creates consistent friction against mating threads, eliminating the need for secondary locking devices and providing permanent fastening solutions for heavy machinery, transportation equipment, and structural assemblies subjected to continuous dynamic loads. With its 220°F temperature rating, this locknut maintains locking performance in elevated temperature applications where thermal cycling would compromise conventional fasteners.

Specification Summary & Compliance

This heavy-duty locknut features 1 1/2"-6 UNC coarse threads with Class 2B thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and reliable thread engagement. The external hex drive design conforms to standard wrenching specifications for compatibility with common installation tools. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental compliance and restricted substance adherence for global industrial distribution. The nylon insert locking mechanism meets industry standards for vibration-resistant fastening applications.