The Hillman Group 180415 5/8-11 YC G8 HEX NUT Product Description Coarse thread. Heat-treated yellow dichromate. Grade 8. From the Manufacturer Hex nuts are for general applications and are used with bolts and washers of the same finish. The most commonly used nut, they are often found in deck and fence building. The called out size is the inner diameter and the number of threads per inch or thread pitch. These nuts are left threaded. Features Coarse Thread, Heat-Treated Yellow Dichromate, Grade 8 The Most Commonly Used Nut, They Are Often Found In Deck And Fence Building Hex Nuts Are For General Applications And Are Used With Bolts And Washers Of The Same Finish From The 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.