Description PART NO: SIZE NPT SAE NPT-U0102T 1/8" 1/4" (With inner tread) NPT-U0202T 1/4" 1/4" (With inner tread) NPT-U0203 1/4" 3/8" NPT-U0204 1/4" 1/2" NPT-U0302 3/8" 1/4" NPT-U0303 3/8" 3/8" NPT-U0304 3/8" 1/2" NPT-U0402 1/2" 1/4" NPT-U0403 1/2" 3/8" NPT-U0404 1/2" 1/2"