TH Marine Mushroom Head Thru-Hulls

All T-H Marine Thru-Hull Fittings are made of the highest quality virgin material to ensure consistent size, extra durability and attractive appearance. All materials are UV stabilized to provide longevity.

STANDARD 90 DEGREE THRU-HULLS - Our standard 90 degree fittings feature a unique finished head and a pass-around nut for easier and more attractive installation, an innovation that T-H Marine developed.

DUAL NUT THRU-HULLS (TH-90 / TH-92) - Traditional two nut 90 degree fittings. Allows for variety of mounting thicknesses. May be used where installtion must be done from the topside with a traditional nut.

SPANER HEAD THRU-HULLS, 3/4" and 111/8" (TH-7590S, TH-1290S) - For those hard to reach applications that may or may not require low clearance. This spaner head thru-hull allows for installation and tightening from the top with a finished head nut.