S-90673A109 1"-8 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread locking technology that maintains clamp force under extreme conditions
• Enhanced corrosion protection with black-oxide steel finish for extended service life in harsh industrial environments
• Heavy-duty performance with Grade 5 strength classification ensuring reliable performance in demanding applications
• Precise thread engagement with Class 2B fit and 1"-8 UNC coarse threads for quick installation and secure fastening
• Industry-standard compatibility with external hex drive design allowing use with common wrenching tools
• Environmental compliance assurance meeting both REACH and RoHS 3 standards for safe industrial use
• Optimized locking performance featuring top lock distorted thread design that eliminates the need for additional locking components

Professional Applications & Engineering Value

This Grade 5 black-oxide steel locknut addresses critical vibration-induced loosening challenges in heavy machinery, construction equipment, and industrial assembly applications. The distorted thread locking mechanism creates permanent friction along the mating threads, effectively resisting rotational forces that cause conventional nuts to loosen. The 1"-8 UNC coarse thread configuration ensures rapid installation while maintaining structural integrity, while the black-oxide surface treatment provides essential corrosion protection in environments exposed to moisture, chemicals, and temperature variations. Engineered for external hex drive compatibility, this locknut integrates seamlessly into existing maintenance protocols without requiring specialized tools or training, making it an ideal solution for vibration-prone assemblies across manufacturing, transportation, and heavy equipment sectors.

Specification Summary & Compliance

This heavy-duty locknut features precise Class 2B thread fit with 1"-8 UNC coarse threads in right-hand orientation, manufactured to industry standards for consistent performance. The distorted thread top lock design provides reliable vibration resistance without compromising thread integrity. Compliance with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations ensures safe usage across various industrial applications. With dimensions of 1-1/2" width and 15/16" height, this Grade 5 steel locknut delivers optimal strength-to-size ratio for demanding fastening requirements.