S-90640A130 5/16"-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 the nylon insert, preventing loosening in high-motion environments.
- Enhanced corrosion protection with the zinc-plated steel finish, extending service life in various conditions.
- Reliable high-temperature performance, with the nylon insert rated for continuous use up to 220°F.
- Easy installation and removal with the standard external hex drive, compatible with common tools.
- Secure and consistent thread engagement due to the UNC coarse threads and Class 2B fit, reducing cross-threading risks.
- Broad industrial compliance, meeting RoHS 3 and REACH standards for safe and regulated use.
- Durable construction from steel, ensuring high strength and reusability in demanding applications.
Professional Applications & Engineering Value
This 5/16"-18 nylon insert lock nut is engineered to solve critical challenges in machinery, automotive, and structural assemblies where vibration-induced loosening is a major concern. The zinc-plated steel construction provides a robust barrier against corrosion, while the nylon insert creates a consistent locking force that maintains clamp load without damaging threads. Its UNC coarse threads and Class 2B fit ensure quick assembly and reliable performance, even in high-cycle applications. Ideal for use in engine components, conveyor systems, and heavy equipment, this lock nut delivers long-term reliability by resisting shock, vibration, and thermal stress up to 220°F, reducing maintenance downtime and enhancing operational safety.
Specification Summary & Compliance
This lock nut features a 5/16"-18 UNC coarse thread with a Class 2B thread fit for standard tolerance and easy assembly. The external hex drive (1/2" width) and 11/32" height provide a familiar and efficient installation profile. Manufactured from zinc-plated steel with a right-hand thread direction, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for industrial and international use.
