Hillman 150006, 5/16 X 18-Inch, 100-Pack Coarse Thread Hex Nuts, 5/16"-18, Steel, 100 Pieces Product Description Hex nuts are to be used with machine bolts to adhere facing materials to prevent tension and shear movement. Specifically in wood to wood, wood to metal, or metal to metal applications. Zinc grade 2 steel hex nuts are recommended for most general uses and are corrosion resistant. Be sure to pre-drill any holes and to use washers and bolts that are a similar grade and finish. 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 5/16" bolt 100 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.