Online Parts Store › 3/4" Black Plastic Thru-Hull w/Broad Flange Image 1 of 1 3/4" Black Plastic Thru-Hull w/Broad Flange $8.00 Molded plastic with broad flange. Per ABYC "Safety Standards for Small Craft". Not recommended for use below the waterline. Add To Cart Added! Molded plastic with broad flange. Per ABYC "Safety Standards for Small Craft". Not recommended for use below the waterline. You Might Also Like Seachoice 90-Degree Thru Hull Fitting, Fits 3/4 In. ID Hose, 7/8 In. Max. Hull $10.31 Seachoice 90 Degree Stainless Steel Covered Thru-Hull $25.96 Seachoice 90-Degree Thru-Hull Connector, Fits 1-1/2 in. ID Hose, 1-3/8 in. Max Hull $17.56 1/2" White Plastic Thru-Hull w/Broad Flange $6.70 Seachoice Mega-Flow Dripless Thru Hull Fitting, 316 Stainless Steel, Fits 5/8 in. Hose, 1-1/2 in. Max. Hull $74.07