NPT THREAD SIZE & FITMENT: Fits standard 1/2 Inch NPT Male x 3/8 Inch NPT Female hex bushing reducer adapter threads. NPT is a nominal pipe size, not actual diameter. Approx. 0.75" OD × 0.625" ID Please confirm size before ordering. Not compatible with compression fittings. Brass hex bushing designed to connect two pipes of different diameters, featuring male NPT threads on one end and female NPT threads on the other—ideal for adapting between pipes with different thread types and sizes. Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Brass Pipe Reducing Bushings are designed for use in water, oil, natural gas, and steam applications Note: This product can expose you to chemicals including lead(1.8%~3.7%), which is not allowed by federal law to be installed for potable water use in the U.S.A. and its territories Hex bushing for connecting two pipes with different diameters. Male NPT threads on one end and female NPT threads on the other for connecting pipes with different ends.Note: This product can expose you to chemicals including lead(1.8%~3.7%), which is not allowed by federal law to be installed for potable water use in the U.S.A. and its territories