S-90675A245 5-40 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
Washer Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through the integrated external-tooth lock washer that bites into surfaces to prevent loosening under dynamic loads
- Enhanced corrosion protection with zinc-plated steel construction, extending service life in demanding industrial environments
- Optimal torque transmission via the external hex drive design that enables secure installation with standard wrenches
- Reliable thread engagement with Class 2B fit UNC coarse threads ensuring consistent performance in right-hand applications
- Industry-standard compatibility with 5-40 UNC coarse threading system for broad interchangeability across equipment
- Environmental compliance assurance meeting both REACH and RoHS 3 standards for safe, sustainable industrial use
- Space-efficient design with compact 9/64" height profile ideal for applications with limited clearance
Professional Applications & Engineering Value
This 5-40 UNC locknut delivers critical vibration-resistant fastening for machinery, automotive, and electrical assemblies where constant motion threatens joint integrity. The zinc-plated steel construction provides durable corrosion resistance while the external-tooth lock washer creates positive mechanical locking without requiring additional components. The external hex drive enables high-torque installation with common tools, and the coarse UNC threads facilitate rapid assembly in production environments. Engineered to maintain clamp force in high-vibration applications, this lock washer nut solves common loosening problems in industrial equipment, transportation systems, and heavy-duty machinery.
Specification Summary & Compliance
This locknut features 5-40 UNC coarse threads with Class 2B thread fit for consistent engagement. Dimensions include 5/16" width across flats and 9/64" height. The assembly incorporates an external-tooth lock washer with 0.344" OD made from steel. The product is manufactured in compliance with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring suitability for regulated industrial applications.
