S-94407A100 4-40 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 mechanism that prevents loosening under dynamic loads
- Enhanced corrosion protection with black-oxide coating on 18-8 stainless steel for extended service life in harsh environments
- Reliable high-temperature performance maintaining locking integrity up to 220°F (104°C) for demanding applications
- Precise thread engagement with Class 2B thread fit ensuring consistent torque values and secure fastening
- Industry-standard compatibility with UNC coarse threads for easy integration with existing fastener systems
- Quick installation and removal using standard wrench tools thanks to the external hex drive design
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
This 4-40 nylon insert locknut delivers exceptional engineering value in applications where vibration-induced loosening compromises system integrity. The black-oxide 18-8 stainless steel construction provides excellent corrosion resistance while the nylon insert creates consistent friction against mating threads, maintaining clamp force in high-vibration environments. The UNC coarse threads offer rapid assembly and disassembly, reducing maintenance time in industrial equipment, automotive systems, and electronic enclosures. With a 220°F temperature rating, this locknut performs reliably in elevated temperature conditions where ordinary fasteners might fail, making it ideal for machinery, transportation, and electrical applications requiring durable, vibration-resistant fastening solutions.
Specification Summary & Compliance
This locknut features Class 2B thread fit per UNC standards with 4-40 thread size and coarse thread spacing. Dimensions include 1/4" width across flats and 9/64" height. Manufactured from 18-8 stainless steel with black-oxide surface treatment and nylon insert locking mechanism. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and chemical safety in industrial applications.
