Hillman 150015 Coarse Thread Hex Nuts, 1/2"-13, 50 Pieces Product Description Coarse thread, zinc plated steel. Pack of 25. 1/2-13 Coarse thread Zinc plated steel Hex nut 50 Pack. 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. Features Zinc coating for a corrosion resistant finish USS coarse nuts for coarse threaded bolts Be sure not to strip your nuts by over tightening Use a nut that is consistent with your other fasteners For use with a 1/2" bolt 50 nuts in each box 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.