Product: Seachoice 18181 Extra Long Thru-Hull Fitting with Broad Flange for 1-1/8 Inch ID Hose – 3 Inch Long Thread
Brand: SEACHOICE
Color: White
Designed for installation in thick transoms or side walls
For applications where up to 2-1/2 inches of thread are required
Constructed of molded high-impact plastic that won't rust
Fits 1-1/8 inch inner diameter (ID) hose
Fits hulls up to 3-3/8 inches thick

Search query: 1 3/4 through hull fittings for boats without barb
Relevance: Substitute