[10000 BULK] Lock Washers Countersunk External Tooth Steel Zinc #4

Ensure fastener integrity in high-vibration environments with our Lock Washers Countersunk External Tooth Steel Zinc #4. This compact washer features a countersunk outer edge and external teeth that bite into the mating surface, delivering reliable locking action even when subject to movement or shock.

Constructed from high-strength steel and finished with a corrosion-resistant zinc plating, this washer combines durability with long-lasting performance in indoor or outdoor applications. The #4 size is ideal for smaller fasteners commonly used in cabinetry, electronics, automotive components, and machinery assemblies.

Key benefits

• Positive locking action: external teeth grip the surface to resist loosening from vibration.
• Countersunk design: sits flush with the surface for a neat, professional finish.
• Corrosion resistance: zinc-plated steel provides protection against rust in normal service conditions.
• Easy to install: simply place with the screw or bolt of the matching diameter and tighten.

Technical specifications

• Material: Steel
• Finish: Zinc
• Type: Countersunk External Tooth Lock Washer
• Size: #4

Applications: Ideal for fastening in electronics enclosures, automotive assemblies, appliances, and machinery where vibration resistance is critical and a flush finish is desired.