The Coilhose H0606DL is a 3/8-Inch MPT Hex Nipple. Designed for use with air hoses and pneumatic tools. Features: * National pipe taper (NPT) * Designed for use with brass, copper, or iron pipe * 3/8-Inch MPT What"s In the Box: * Coilhose H0606DL 3/8-Inch MPT Hex Nipple