Hollow Hex Head Plug 1/4 in Nominal Pipe Size Brass C36000 Male NPT 1/2 in Outside Diameter 7/16 in Overall Length 4 100 psi Maximum Operating Pressure -40 Degrees to 400 Degrees F Plug Construction Cored Plug Drive Style 1/4 in Hex Includes Pre-Applied Thread Sealant No Includes Seal No 1/4 in -18 Magnetic No