S-95615A130 1/4"-28 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon insert locking that maintains secure fastening in high-motion applications
• Enhanced durability and corrosion protection through zinc-plated steel construction for extended service life
• Reliable performance in elevated temperatures, with the nylon insert effective up to 220°F (104°C)
• Precise thread engagement with Class 2B fine UNF threading ensuring accurate fit and reduced risk of cross-threading
• High-strength Grade 5 rating providing dependable load-bearing capacity for demanding industrial use
• Easy installation and removal with standard external hex drive compatible with common wrenches
• Compliance with environmental standards including REACH and RoHS 3, ensuring safe and sustainable usage

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel locknut is engineered to address critical challenges in machinery, automotive, and assembly systems where vibration-induced loosening compromises safety and performance. The nylon insert locking mechanism creates consistent friction on the UNF fine threads, effectively resisting rotational forces without requiring additional locking hardware. Its external hex design allows for straightforward torque application, while the Class 2B thread fit ensures compatibility with standard 1/4"-28 UNF bolts, minimizing assembly errors. Ideal for motors, conveyors, and structural frameworks, this locknut delivers long-term reliability under dynamic loads and temperature variations up to 220°F.

Specification Summary & Compliance

This locknut features a 1/4"-28 UNF fine thread with Class 2B thread fit for precise dimensional accuracy. Manufactured from zinc-plated steel with a standard hex profile (7/16" width, 5/16" height) and right-hand threading. It conforms to Grade 5 strength classification and meets REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) compliance standards, ensuring adherence to industry safety and environmental regulations.