PIPE AND HOSE PIPE AND HOSE (FLARE type) 2) 2) PIPE AND HOSE PIPE AND HOSE (ORFS type) 3) 3) FITTING FITTING 4) 4) 7-6 Thread size (PF) Width across flat (mm) kgf·m lbf·ft 1/4" 19 4 28.9 3/8" 22 5 36.2 1/2" 27 9.5 68.7 3/4" 36 18 130 1" 41 21 152 1-1/4" 50 35 253 Thread size (UNF) Width across flat (mm) kgf·m lbf·ft 9/16-18 19 4 28.9 11/16-16 22 5 36.2 13/16-16 27 9.5 68.7 1-3/16-12 36 18 130 1-7/16-12 41 21 152 1-11/16-12 50 35 253 Thread size Width across flat (mm) kgf·m lbf·ft 1/4" 19 4 28.9 3/8" 22 5 36.2 1/2" 27 9.5 68.7 3/4" 36 18 130 1" 41 21 152 1-1/4" 50 35 253