Value Collection R52000919 External Tooth Lock Washer

Product Description

The VALUE COLLECTION R52000919 is a No. 8 screw external tooth lock washer made from Grade 2 spring steel with a zinc-plated finish. It features an inside diameter of 0.176 inches and an outside diameter of 0.381 inches, with a thickness of 0.023 inches. The external tooth design bites into the mating surface under torque load, resisting loosening from vibration and dynamic stress. Hardness is rated at 40-50 HRC, providing reliable grip and retention in standard fastening applications. This washer is suited for electricians, HVAC technicians, plumbers, and general trade professionals who need dependable hardware for panel, bracket, and equipment assembly work.

This lock washer is used in light-duty to medium-duty fastening applications across residential and commercial trades. It is compatible with No. 8 screws and is commonly used in electrical enclosures, HVAC equipment panels, sheet metal assemblies, and similar installations where vibration resistance is required. The zinc-plated finish provides basic corrosion resistance for indoor and protected-environment use. This item is sold in minimum order quantities of 1000 units, making it practical for stocking or high-volume installation work.

Key Features

• External tooth design bites into mating surface to resist loosening under vibration
• Grade 2 spring steel construction with 40-50 HRC hardness for reliable retention
• Zinc-plated finish for basic corrosion resistance in indoor applications
• 0.176 inches inside diameter sized for No. 8 screws
• 0.023 inches thickness for low-profile installation in tight assemblies
• Minimum order quantity of 1000 units for stocking and volume use

Compatibility

Designed for use with No. 8 screws in standard fastening applications across electrical, HVAC, plumbing, and general mechanical assemblies.

Installation Notes

This washer is installed by electricians, HVAC technicians, and general tradespeople during panel, bracket, and equipment assembly work. Always power down or de-energize equipment before installing hardware in or around electrical enclosures. Place the washer between the fastener head and the mating surface with the teeth facing the surface to be gripped. Do not reuse lock washers that have been fully compressed, as the tooth engagement and spring tension will be reduced.