S-97135A423 1/2"-13 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through nylon insert locking technology, preventing loosening in high-motion applications
- Exceptional strength and durability with Grade 8 steel construction, suitable for heavy-duty industrial use
- Enhanced corrosion protection from black-oxide coating, extending service life in demanding environments
- Reliable high-temperature performance with nylon insert rated up to 220°F (104°C)
- Easy installation and removal with standard external hex drive and UNC coarse threading
- Precise thread engagement with Class 2B fit ensuring consistent performance and reduced cross-threading risk
- Compliance with international standards including REACH and RoHS 3 for global industrial applications
Professional Applications & Engineering Value
This Grade 8 heavy-duty locknut delivers critical vibration resistance for industrial machinery, automotive assemblies, and construction equipment where secure fastening is paramount. The nylon insert locking mechanism creates consistent friction against mating threads, maintaining clamp force despite continuous vibration or thermal cycling. Manufactured from black-oxide steel, it provides superior corrosion resistance compared to plain steel alternatives, while the UNC coarse thread profile enables rapid installation in production environments. The combination of high-temperature capability (220°F maximum) and Class 2B thread fit ensures reliable performance in engine compartments, hydraulic systems, and other demanding applications where thermal expansion and vibration are constant challenges.
Specification Summary & Compliance
This locknut features 1/2"-13 UNC coarse threading with Class 2B thread fit for precision engagement. Dimensions include 3/4" width across flats and 19/32" height. Manufactured to industrial standards using Grade 8 steel with black-oxide surface treatment. Compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations for environmental safety and restricted substances.
