Whitecap 90 Degree Thru-Hull Fitting w Barb Whitecap Nylon Thru-Hull Fittings are constructed of high quality nylon and 316 stainless steel. These thru-hulls have a 90 degree angle and include a barb. Whitecap Thru-Hulls are available in a wide range of sizes. See specifications below. Part Hose Size Flange O.D. Thread Length Barb Length Overall Length Cut-Out Max Hull Thickness S-3807C 58 1-78 1-58 78 3-18 1-516 1-14 S-3808C 34 1-78 1-78 1516 3-18 1-516 1-14 S-3809C 1 1-78 1-58 1-18 3-12 1-516