S-95615A120 1/4"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism that maintains secure fastening in high-motion environments
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in industrial conditions
• High-strength performance meeting Grade 5 specifications for reliable load-bearing capacity in demanding applications
• Easy installation and removal with standard 7/16" hex profile and UNC coarse threads that resist cross-threading
• Temperature resilience with nylon insert rated to 220°F (104°C) for stable performance in heated environments
• Precision thread engagement with Class 2B fit ensuring consistent torque values and reliable clamping force
• Regulatory compliance meeting RoHS 3 and REACH standards for safe use across global industrial markets

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel locknut delivers critical vibration resistance where conventional fasteners fail. The nylon insert locking mechanism creates consistent friction against mating threads, preventing loosening under dynamic loads in machinery, automotive assemblies, and industrial equipment. The UNC coarse thread profile enables rapid installation while resisting debris accumulation in harsh environments. With a 220°F temperature rating, this locknut maintains integrity in engine compartments, motor mounts, and processing equipment where thermal cycling occurs. The zinc plating provides sacrificial corrosion protection, extending service life in outdoor or humid conditions while the 7/16" hex drive accommodates standard tools for efficient maintenance cycles.

Specification Summary & Compliance

This locknut features 1/4"-20 UNC coarse threads with Class 2B thread fit per ASME B1.1 standards, ensuring precise engagement with mating components. Manufactured from Grade 5 steel for consistent mechanical properties, the nut meets industry specifications for strength and durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no restricted substances above threshold limits. Dimensions include 7/16" width across flats and 5/16" height for standardized installation requirements.