7/8"-20 Nuts | McMaster-Carr

These nuts have good chemical resistance and may be mildly magnetic. Also known as jam nuts, they are about half the height of standard hex nuts. Use them in low-clearance applications or jam one against another nut to hold it in place.

For technical drawings and 3-D models, click on a part number.

18-8 Stainless Steel
Thread Size	Wd.	Ht.	Pkg. Qty.		Pkg.
7/8"-20	1 5/16"	31/64"	1	000000000	000000

Left-Hand Threaded Super-Corrosion-Resistant
316 Stainless Steel Thin Hex Nuts

Made of 316 stainless steel for excellent corrosion resistance—including in salt water—these nuts tighten to the left and won’t loosen from counterclockwise motion. For use in low-clearance areas, they’re half the height of standard hex nuts. They can also be jammed against another nut to hold it in place. When used with a standard hex nut, they’re good for fastening most equipment.

For technical drawings and 3-D models, click on a part number.

316 Stainless Steel
Thread Size	Width	Height		Each
7/8"-20	1 5/16"	31/64"	000000000	000000

Left-Hand Threaded Brass Thin Hex Nuts

These nuts tighten to the left and won’t loosen from counterclockwise motion. Made from brass, they resist corrosion, conduct electricity, and are nonmagnetic. They’re half the height of standard hex nuts, so they’re good for use in low-clearance areas. Jam them against another nut to hold them in place. When used with a standard hex nut, they’re suitable for fastening most equipment.

For technical drawings and 3-D models, click on a part number.