S-90392A028 1/4"-20 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through center lock distorted thread design that maintains secure fastening in high-stress environments
- Exceptional strength and durability with Grade 8 steel construction, capable of withstanding heavy-duty industrial applications
- Enhanced corrosion protection provided by zinc plating, extending service life in demanding conditions
- Reliable left-hand thread engagement ensures proper installation in reverse-thread applications and prevents accidental loosening
- Precise UNC coarse thread compatibility with Class 2B fit guarantees consistent performance and easy assembly
- Standard external hex drive allows for conventional tooling and straightforward installation procedures
- Full regulatory compliance with RoHS 3 and REACH standards for safe industrial use and environmental responsibility
Professional Applications & Engineering Value
This Grade 8 zinc-plated steel locknut delivers critical vibration resistance in demanding industrial environments where conventional fasteners fail. The center lock distorted thread technology creates permanent mechanical interference that prevents back-off under continuous stress and shock loads. Engineered with left-hand UNC coarse threads and Class 2B thread fit, this specialized locknut provides reliable performance in reverse-thread applications across machinery, automotive, and heavy equipment sectors. The zinc-plated finish offers superior corrosion protection while the external hex drive ensures compatibility with standard installation tools, reducing maintenance downtime and replacement costs in vibration-intensive operations.
Specification Summary & Compliance
This locknut features precise 1/4"-20 UNC coarse threads with Class 2B thread fit tolerances, ensuring consistent engagement and reliable performance. Manufactured to industrial standards with 7/16" hex width and 7/32" height dimensions. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety requirements for industrial fasteners.
