S-90640A140 1/4"-28 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 with precision-engineered nylon insert that maintains locking force in high-motion applications
- Enhanced corrosion protection through zinc plating that extends service life in demanding industrial environments
- Reliable high-temperature performance with nylon insert rated for continuous operation up to 220°F (104°C)
- Precise thread engagement with Class 2B thread fit ensuring consistent torque values and reduced cross-threading risk
- Industry-standard compatibility with UNF fine thread profile (1/4"-28) for seamless integration with existing equipment
- Easy installation and removal using standard external hex drive design with 7/16" width for common wrench access
- Comprehensive regulatory compliance meeting RoHS 3 and REACH standards for global industrial applications
Professional Applications & Engineering Value
This nylon insert locknut delivers critical vibration resistance where conventional fasteners fail. The zinc-plated steel construction provides durable corrosion protection while the precision UNF fine threads (1/4"-28) maintain secure connections in high-cycle applications. Engineered with Class 2B thread fit, these locknuts prevent loosening in machinery, automotive assemblies, and industrial equipment subjected to constant motion. The nylon insert locking mechanism creates consistent friction that outperforms mechanical locking methods, making it ideal for maintenance-critical applications where disassembly is required. With temperature resistance to 220°F, this solution maintains integrity in environments where thermal cycling would compromise other locking technologies.
Specification Summary & Compliance
This locknut features Class 2B thread fit per UNF standards with fine thread spacing (1/4"-28) and right-hand threading. Manufacturing conforms to industry standards for external hex drive (7/16" width) and standard hex nut profile (5/16" height). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and material safety for industrial applications worldwide.
