PO-FP Brass Push-On Hose Barb x Female NPT Check Part Number HOSE I.D. A THREAD NPT L BARB LENGTH C D TAP DRILL WORKING PRESSURE PO0402FP 1/4 1/8-27 1.35 .87 ½ .176 .339 300 psi PO0404FP 1/4 1/4-18 1.51 .87 5/8 .176 .414 300 psi PO0604FP 3/8 1/4-18 300 psi PO0606FP 3/8 300 psi