Standard Thread has full length thread for thick hulls and easy tightening * Hose Size: 1" I.D. * Flange Dia.: 2 1/4" * Thread O.D.: 1 3/8", Thread Length: 2 1/4", Barb Length: 1 1/4", Total Length: 3 7/8" * Install. Hold size: 1 1/2", Thread NPSM: 1", Max Hull Thickness: 1 3/4"