S-91333A150 1/4"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism, preventing loosening in high-motion applications
• Enhanced corrosion protection with black corrosion-resistant coating, extending service life in harsh environments
• Reliable high-temperature performance with nylon insert rated for temperatures up to 220°F (104°C)
• Easy installation and removal with standard external hex drive design compatible with common tools
• Precise thread engagement with UNC coarse threads and Class 2B fit ensuring consistent performance
• Durable steel construction providing excellent strength-to-weight ratio for demanding applications
• Environmental compliance meeting RoHS 3 and REACH standards for responsible manufacturing

Professional Applications & Engineering Value

This 1/4"-20 nylon insert locknut delivers critical vibration resistance where conventional fasteners fail. The black corrosion-resistant coated steel construction withstands exposure to moisture, chemicals, and outdoor elements, making it ideal for automotive assemblies, industrial machinery, and equipment manufacturing. The nylon insert creates consistent locking torque without damaging threads, while the UNC coarse threads provide rapid installation in production environments. Engineered to maintain clamping force under continuous vibration, this locknut eliminates the need for secondary locking devices, reducing assembly time and maintenance costs in heavy-duty applications where reliability is paramount.

Specification Summary & Compliance

This locknut features 1/4"-20 UNC coarse threads with Class 2B thread fit for standard tolerance applications. The external hex drive measures 7/16" across flats with a 5/16" height profile. Manufactured from steel with black corrosion-resistant coating and nylon insert locking element. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring regulatory compliance for industrial and commercial use.