The Hillman Group 180267 Keps Lock Nut, 6-Inch by 32-Inch, 100-Pack Product Description Keeps Lock Nuts include a hex nut with a pre-assembled, free-spinning external tooth lock washer. They should be used in low-load assemblies to ensure a lasting, reliable hold for any project. These nuts have an external star washer attached and when tightened, they bite into a soft surface thus providing a locking action. They are zinc-plated and rust/corrosion resistant. From the Manufacturer Keps Lock Nuts include a hex nut with a pre-assembled, free-spinning external tooth lock washer. They should be used in low-load assemblies to ensure a lasting, reliable hold for any project. These nuts have an external star washer attached and when tightened, they bite into a soft surface thus providing a locking action. They are zinc-plated and rust/corrosion resistant. Features The locking occurs when the washer is tightened against the bearing surface For use in low-load assemblies and ensure a lasting hold for any project Zinc Plated Brand: The Hillman Group USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.