Hex nuts are the “glue” that hold connecting parts together on a nipple or pipe in a lamp or lighting fixture. Assortment Includes: 4 ? 8-32 Hex Nuts ? Steel; 2 ? 1/4-27 Hex Nuts ? Steel; 6 ? 1/8 IP Hex Nuts ? Steel; 2 ? 1/4 IP Hex Nuts ? Steel; 2 ? 3/8 IP Hex Nuts ? Steel