TH Marine straight thru-hull fittings made of UV (ultra-violet) stabilized plastic to ensure durability. TH Marine has worked with major hose manufacturers to guarantee that their hose barbs have the exact specifications to fit any hose securely so that installations will be hassle free.
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Item Part #
Hose Diameter (inches)
Stem Length (inches)
Flange Diameter (inches)
Installation Hole Diameter (inches)
Total Threaded Portion (inches)
I need to run a 5/16 main and jib halyard thru the deck at the base of the mast. Will this work or is there a better product for this purpose. 21' Highlander day sailer.Mike GrantCustomer # 1103502
Hi Mike, Ronstan, Schaefer and Harken all have thru-deck fairleads which are better designed for your application. We currently have Schaefer 7606 in stock that may suit your 5/16 line nicely.
JD Tech Associate
is the size given the ID of the fitting?
The size is the nominal hose size it is compatible with. Inside diameter will be somewhat smaller (about 1/4" less). The Tech Specs table gives the other relevant dimensions.
What sixe diameter over flow tube doe I need or can you recommend one?
Tube is inserted into the fitting connector...
No idea what size unless you can be more specific as to what size hose you are using, what type boat, etc.On my boat if I overflow the water tank it just runs out on deck.
What size was the hose?Overflow from what??
I used a 5/8 hose to the thru hull fitting.
Thanks Bill, no problem there. I am interested I learning the diameter of the the overflow tube that I need to insert from the inside tank....
Thanks Bobby,for your return. I am interested in learning the diameter of the overflow tube that you insert into the connector from inside the tank. This tube allows you to fill the tank and if you forget to turn the pump switch off the water will flow down over and down he tube to exit the tank. To empty the tank you simple pull the tube out...
Not sure what tank you are referring to.
Quality Above-Waterline Thru-Hull
With lots of cheap plastic on the market (selling for top dollar), JD came through by offering a quality material at an affordable price. I don't take chances with thru-hulls, and I use this one!
Fits well but strips easily
Weakest thru-hull fitting I've used. Tightened with channel-locks turned sideways in restricted space (not much torque possible) and I stripped threads on first of four fittings used. Will have to order another to match and will go easier on torque.