Thru-Hull Step Wrench

Model # 6607741 Mfg # THT-530
4.8 out of 5 Customer Rating
Advice & How-To
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.
Thru-Hull Step Wrench
Model # 6607741 Mfg # THT-530
4.8 out of 5 Customer Rating
Advice & How-To
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.
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THT-530 makes the installation of standard GROCO thru-hull fittings possible by a single installer. Slide the thru-hull fitting, flanged end first, over the tool. (It will stop at the proper step.) Tie a length of monofilament to the eye and place it into the already-cut hole in the hull of the boat. Apply caulking to the flange of the fitting, and pull the fitting through the hole and against the hull from inside the boat. Thread the monofilament through the locknut or seacock. With the fitting pulled firmly against the hull, the locknut or the seacock may be screwed onto the fitting.Designed for Groco Thru Hull fittings from 1/2 inch up to 3 inches. This tool may not be compatible with fittings from other sources.

Dimensions 1/2" to 3"
Type Tools

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