Hex Head Plug 1/4 in Nominal Pipe Size Stainless Steel Bright 316L Male NPT 1/2 in Outside Diameter 7/16 in Overall Length 7 500 psi Maximum Operating Pressure -425 Degrees to 1200 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