Hillman Fasteners 180412 Hex Nut, 1/2-13, 50 PackHex 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. 50 pack 1 2 13 Zinc plated steel 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 Finish: heat treated yellow dichromate Thread Type: coarse.