Value Collection 239020PS External Tooth Lock Washer

Product Description

The VALUE COLLECTION 239020PS is a 4 screw external tooth lock washer designed to prevent fastener loosening under vibration and dynamic load. Made from Grade 2 spring steel with a zinc-plated finish, this washer features serrated external teeth that bite into the bearing surface and fastener head as the assembly is torqued down. It has an inside diameter of 0.123 inches, an outside diameter of 0.26 inches, and a thickness of 0.019 inches. Hardness runs 40 to 50 HRC, providing the spring tension needed to maintain clamp load in assemblies subject to movement or vibration.

This washer is suited for use in light mechanical assemblies, electrical panel fastening, enclosure hardware, and general-purpose industrial applications where a 4 screw fastener is specified. It is commonly installed in sheet metal assemblies, junction boxes, and equipment housings where preventing fastener back-out is a priority. The zinc plating provides moderate corrosion resistance for indoor and light-duty environments. Typical installers include electricians, mechanical assemblers, and maintenance technicians working with standard screw fasteners.

Key Features

• External tooth design bites into mating surfaces to resist fastener loosening under vibration
• Grade 2 spring steel construction with 40 to 50 HRC hardness for consistent spring tension
• Zinc-plated finish for moderate corrosion resistance in indoor applications
• Inside diameter of 0.123 inches fits 4 screw fasteners
• Low-profile thickness of 0.019 inches minimizes stack height in tight assemblies

Compatibility

Designed as a standard external tooth lock washer for use with 4 screw fasteners in general mechanical and electrical assemblies.

Installation Notes

Install with the toothed side facing the bearing surface or fastener head, not against the workpiece threads. Power down any electrical equipment before servicing fastened assemblies in live panels or enclosures. Use appropriate torque for the fastener grade and material being clamped. Do not reuse lock washers that have been fully compressed or show signs of deformation, as the spring tension will not be restored.