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