Value Collection 31349 External Tooth Lock Washer 5/8 in 50pk

Product Description

The VALUE COLLECTION 31349 is a zinc-plated, Grade 2 steel external tooth lock washer sized for 5/8 inch screws. Sold in a pack of 50, this washer features serrated external teeth that bite into the mating surface and fastener head to resist loosening caused by vibration and torque. The zinc plating provides basic corrosion resistance for general indoor and light-duty outdoor applications. With an inside diameter range of 0.640 to 0.659 inches and an outside diameter range of 1.045 to 1.070 inches, the washer seats correctly on standard 5/8 inch fasteners. Thickness is 0.045 inches. Licensed tradespeople, maintenance technicians, and assembly workers rely on this type of washer to secure panel hardware, structural connections, and equipment mounts.

External tooth lock washers in this size range are used across a wide range of applications including electrical panel assembly, HVAC equipment mounting, plumbing fixture attachment, and general mechanical assembly. The external tooth design provides greater holding force compared to internal tooth versions, making it a practical choice where vibration is a consistent factor. This washer is appropriate for residential and light commercial work where Grade 2 steel and zinc-plated finish meet the job requirements.

Key Features

• External tooth design bites into fastener and mating surface to resist vibration-induced loosening
• Zinc-plated finish provides basic corrosion resistance for general service environments
• Grade 2 steel construction suitable for standard-duty fastening applications
• Inside diameter range 0.640 to 0.659 inches fits standard 5/8 inch fasteners
• Outside diameter range 1.045 to 1.070 inches for adequate bearing surface coverage
• Pack of 50 supports production assembly, service calls, and shop stock

Compatibility

Designed for use with standard 5/8 inch screws and bolts in general mechanical, electrical, HVAC, and plumbing fastening applications where an external tooth lock washer is specified.

Installation Notes

Install this washer between the fastener head and the mating surface with the teeth facing the fastener head for maximum holding effect. Ensure the mating surface and fastener are free of debris before assembly. Follow applicable codes such as NEC or IFGC when using fasteners in electrical or gas equipment installations. Do not reuse lock washers that have been fully compressed, as the teeth will no longer provide effective locking action.