S-90636A112 1/4"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through center lock distorted thread technology, preventing loosening in high-stress environments
• Exceptional strength and durability with Grade 8 steel construction, suitable for heavy-duty industrial applications
• Enhanced corrosion protection from black-oxide coating, extending service life in demanding conditions
• Reliable thread engagement with Class 2B fit UNC coarse threads, ensuring consistent performance
• Easy installation and removal using standard 7/16" external hex drive, compatible with common tools
• Environmental compliance meeting RoHS 3 and REACH standards for safe industrial use
• Right-hand thread design providing standard directional installation for efficient assembly

Professional Applications & Engineering Value

This Grade 8 Black-Oxide Steel Locknut with center lock distorted thread technology addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and construction equipment. The 1/4"-20 UNC coarse thread configuration combined with the precisely engineered distortion at the thread center creates consistent locking pressure that maintains clamp load under extreme dynamic loads. The black-oxide surface treatment provides essential corrosion resistance while maintaining dimensional stability, making these external hex locknuts ideal for applications where reliability cannot be compromised. Engineered for heavy-duty industrial fastening, these locknuts deliver predictable, repeatable performance in high-vibration environments where standard nuts would fail.

Specification Summary & Compliance

This locknut features 1/4"-20 UNC coarse threads with Class 2B thread fit for precise engagement, manufactured to industry standards for dimensional accuracy. The 7/16" hex width and 7/32" height provide optimal tool engagement and space efficiency. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial suitability. The Grade 8 strength classification guarantees high tensile performance for demanding applications.