S-90619A228 1 1/2"-6 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the steel insert locking mechanism, ensuring long-term joint integrity in high-stress environments
• Exceptional strength and durability with Grade 8 steel construction, capable of withstanding heavy loads and extreme conditions
• Space-saving thin hex profile allows for installation in confined areas without compromising on holding power
• Reliable coarse threading (1 1/2"-6 UNC) provides faster assembly and reduced cross-threading risk compared to fine threads
• Precision Class 2B thread fit ensures smooth engagement and consistent performance with standard bolts
• External hex drive design enables easy installation and removal with common wrench tools
• Environmental compliance with RoHS 3 standards, making it suitable for regulated industrial applications

Professional Applications & Engineering Value

This Grade 8 steel locknut with steel insert locking technology addresses critical vibration-induced loosening challenges in heavy machinery, construction equipment, and automotive assemblies. The thin hex profile provides significant space advantages in compact designs while maintaining full Grade 8 strength classification. Engineered with 1 1/2"-6 UNC coarse threads, it delivers rapid installation in time-sensitive maintenance operations and resists clogging in dirty environments. The external hex drive ensures compatibility with standard industrial tools, reducing specialized tooling requirements. Ideal for heavy-duty applications where vibration resistance and reliable locking performance are paramount, this locknut maintains joint integrity under continuous dynamic loading conditions.

Specification Summary & Compliance

This locknut features 1 1/2"-6 UNC coarse threads with Class 2B thread fit tolerance for precise mating with standard bolts. Manufactured from high-strength Grade 8 steel with dimensions of 2 1/4" width and 1" height in a thin hex profile. The product complies with RoHS 3 (2015/863/EU) environmental standards and incorporates a steel insert locking mechanism for secure fastening. Right-hand threaded design follows industry-standard UNC thread specifications for universal compatibility across industrial applications.