S-97135A428 5/8"-18 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 that maintains secure fastening under dynamic loads
- Exceptional strength and durability with Grade 8 steel construction for heavy-duty industrial applications
- Enhanced corrosion protection from black-oxide surface treatment in demanding environments
- Reliable high-temperature performance with nylon insert rated up to 220°F for thermal stability
- Precision thread engagement with Class 2B UNF fine threads ensuring consistent, secure connections
- Easy installation and removal using standard external hex drive with 15/16" width
- Compliance with environmental standards including REACH and RoHS 3 for regulated industries
Professional Applications & Engineering Value
This Grade 8 nylon insert locknut delivers critical vibration resistance in demanding industrial environments where loosening under dynamic loads poses significant safety and performance risks. The black-oxide steel construction provides essential corrosion protection while maintaining the high tensile strength required for heavy machinery, automotive, and construction applications. The 5/8"-18 UNF fine thread configuration ensures precise engagement with mating components, while the nylon insert creates consistent locking force without damaging threads. Engineered to withstand temperatures up to 220°F, these locknuts maintain their integrity in thermal cycling conditions, making them ideal for engine components, industrial equipment, and transportation systems where reliability is paramount.
Specification Summary & Compliance
This heavy-duty locknut features Class 2B thread fit with 5/8"-18 UNF fine threads in right-hand orientation, ensuring precise dimensional accuracy per industry standards. The external hex drive measures 15/16" across flats with a 3/4" height profile. Manufactured from Grade 8 steel with black-oxide finish, the component is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, meeting the stringent requirements for industrial and commercial applications.
