Value Collection 239080PS External Tooth Lock Washer

Product Description

The VALUE COLLECTION 239080PS is a zinc-plated, Grade 2 steel external tooth lock washer designed for use with 5/16 inch screws. The external tooth profile bites into the bearing surface of a fastener and the mating material, resisting loosening caused by vibration and torque. With an inside diameter of 0.332 inches and an outside diameter of 0.61 inches, this washer fits standard 5/16 inch fastener assemblies. The zinc plating provides a basic level of corrosion resistance suited to general indoor and light-duty applications. At a thickness of 0.034 inches, the washer adds minimal stack height while maintaining reliable locking action.

This external tooth lock washer is used across a wide range of trade and industrial applications wherever fastener retention under vibration is required. Common installation scenarios include electrical panel assemblies, HVAC equipment mounting hardware, plumbing fixture brackets, and general mechanical assemblies. It is installed by electricians, HVAC technicians, plumbers, and maintenance professionals as part of standard bolted connections. The washer is suited to residential and light commercial equipment where Grade 2 steel and zinc finish meet the application requirements.

Key Features

• External tooth design grips both fastener and mating surface to resist vibration-induced loosening
• Zinc-plated finish provides basic corrosion resistance for general-duty use
• Grade 2 steel construction offers reliable performance in standard mechanical assemblies
• 0.332 inch inside diameter sized for 5/16 inch screw fasteners
• Thin 0.034 inch profile minimizes added stack height in tight assemblies

Compatibility

Designed as a standard external tooth lock washer for use with 5/16 inch screw fasteners in general mechanical, electrical, and HVAC assembly applications.

Installation Notes

External tooth lock washers are installed between the fastener head and the bearing surface before torquing the fastener. Ensure the mating surface is free of coatings, paint, or contamination that would prevent the teeth from biting in and establishing a reliable lock. De-energize any electrical assembly before installing or removing fasteners. Follow applicable code requirements such as NEC for electrical installations.