Standard: ASME/ANSI B18.2.1-6; Thread Type: Full Thread, Coarse Thread UNC
Thread Size: 5/16 inch; Thread Pitch: 18 threads per inch (TPI)
Width from flat to flat: 0.489 inch to 0.5 inch; Width from point to point: 0.557 inch to 0.577 inch; Head Height: 0.195 inch to 0.211 inch
Package: 12 PCS; Hex Drive Size: 1/2 inch
Material: 304 Stainless Steel 18-8 that you will probably see in your pans and cookery tools. It's used for a wide variety of home and commercial applications. Because of its slightly higher strength and wear resistance than type 316, it's also used for nuts, bolts, screws and other fasteners.