Can someone there please take an accurate inside diameter measurement of an attwood 3874-3 at mushroom head end. (Attwood 3874-3 Thru-Hull Connector Fitting, 3-1/4'' Length, 1-1/4'' Hull Thickness)

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Nov 18, 2025 - 05:41 AM

Unfortunately, we do not have one of these Attwood 3874-3 Thru-Hull Connector Fittings in a warehouse that we can access. You probably already have this info, but the inside diameter (ID) is approx 1-3/16" +/- .125" for this fitting.

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Can someone there please take an accurate inside diameter measurement of an attwood 3874-3 at mushroom head end.

Attwood 3874-3 Thru-Hull Connector Fitting, 3-1/4'' Length, 1-1/4'' Hull Thickness

The Attwood 3874-3 is a thru-hull connector fitting designed to fit a 1-1/8' to 1-1/4' inside diameter hose, and will fit a max hull thickness of 1-1/4'.

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