Value Collection 239120PR External Tooth Lock Washer

Product Description

The VALUE COLLECTION 239120PR is a zinc-plated, steel external tooth lock washer sized for 9/16 inch screws. It features an inside diameter of 0.596 inches and an outside diameter of 0.985 inches, with a thickness of 0.045 inches. The external tooth design bites into the mating surface and fastener head under torque load, resisting loosening caused by vibration and dynamic stress. Manufactured from Grade 2 steel with a zinc-plated finish for basic corrosion resistance, this washer suits a wide range of mechanical assembly applications across HVAC, electrical, plumbing, and general trade work.

This washer is intended for use in bolted assemblies where vibration-resistant fastening is required. It fits 9/16 inch screws and bolts in standard mechanical and structural connections. Typical applications include panel mounting, equipment framing, conduit support hardware, and general equipment assembly in both residential and light commercial settings. It is installed by electricians, HVAC technicians, plumbers, and general mechanical tradespeople during equipment assembly and service work.

Key Features

• External tooth design provides positive locking action against loosening from vibration
• 0.596 inch inside diameter fits standard 9/16 inch fasteners
• 0.985 inch outside diameter provides adequate bearing surface for load distribution
• 0.045 inch thickness for consistent seating in standard assemblies
• Grade 2 steel construction for dependable mechanical strength
• Zinc-plated finish offers basic protection against corrosion in dry to mildly humid environments

Compatibility

Designed as a standard external tooth lock washer for 9/16 inch screws and bolts in general mechanical, electrical, and HVAC assembly applications.

Installation Notes

Install with the toothed face contacting the fastener head or the mating surface to ensure proper locking engagement. Power down or de-energize any equipment before servicing fastened assemblies on electrical or HVAC components. Use appropriate hand tools and follow torque guidelines specified by the equipment manufacturer for the fastener being used. Inspect washers for deformation or tooth damage before reuse.