S-90640A129 1/4"-20 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
- Enhanced corrosion protection with zinc-plated steel construction, extending service life in demanding environments
- Reliable high-temperature performance with nylon insert rated for continuous operation up to 220°F
- Quick installation efficiency with standard external hex drive and coarse UNC threads for faster assembly
- Precise thread engagement with Class 2B fit ensuring consistent torque values and secure fastening
- Industry-standard compatibility with 1/4"-20 UNC coarse threading for broad equipment interoperability
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
Professional Applications & Engineering Value
This nylon insert lock nut delivers critical vibration resistance for machinery, automotive, and industrial equipment where constant motion threatens fastener integrity. The zinc-plated steel construction provides essential corrosion protection in manufacturing environments, while the UNC coarse threads enable rapid installation without cross-threading risks. Engineered with a standard hex profile for universal wrench compatibility, this locknut maintains clamping force under extreme vibration, eliminating the need for secondary locking mechanisms. The 220°F temperature rating ensures reliable performance in engine compartments, motor mounts, and industrial machinery where thermal cycling occurs. With its Class 2B thread fit, this fastener delivers consistent torque-to-clamp performance across production runs, reducing assembly variables and improving manufacturing consistency.
Specification Summary & Compliance
This locknut features 1/4"-20 UNC coarse threads with Class 2B fit for standard industrial applications. The external hex drive measures 7/16" across flats with a 5/16" height profile. Manufactured from zinc-plated steel with right-hand threading and nylon insert locking mechanism. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance compliance for industrial distribution.
