Perko 5/8" Thru-Hull Connection f/ use with Hose Bronze Flange is machined to fit and grooved to retain bedding compound neck is threaded to approximately 3/16 inch from flange. Cast bronze, plain or chromed brass Regular or short length versions Regular Length- Fits maximum hull thickness up to 2 inches Short Length- For thin hull sections up to 5/8 inches maximum Technical Information Regular Length - Plain Bronze: Hose Size Inches: 5/8 Mounting Hole Diameter Inches: 13/16 Maximum Hull Thickness Inches: 1-1/16 O.D. Flange Inches: 1-1/2 Model Number: 0350004DPP Ship Weight: 1.9/3.0 lbs. Made in the USA