Hillman 829712 8-32 SS Nylon Lock NUT Product Description Stainless steel. Hex stop nut. Coarse thread. Low-carbon steel. From the Manufacturer Nylon Insert Lock Nuts are also known as stop nuts. Lock nuts are used for fastening to a bolt when mechanically joining materials together. The bolt threads into the nylon material are located at the top of the nut. The purpose of the nylon insert is to prevent backing off or loosening from vibration. Features Stainless Steel. Hex Stop Nut. Coarse Thread. Low-Carbon Steel Country Of Origin: China From The Brand Name: Hillman Model Number: 829712 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.