https://www.hopkins-carter.com/nylonfitting.html
Nylon Fittings & Thru-Hulls
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https://www.force4.co.uk/item/TruDesign/Long-Domed-Skin-Fittings-Thru-Hulls/4IKH
TruDesign Long Domed Thru-Hulls Skin Fittings
Buy now from the UK's largest Chandlery online and in store. Designed for larger hull-thickness vessels TruDesign Long Skin Fittings (Thru Hulls) are precision...
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https://marinetradingpost.com/product-category/pumps-plumbing/thru-hulls-scuppers/
Thru Hulls & Scuppers for Boats | Marine Trading Post
Shop durable thru hulls and scuppers for marine plumbing at Marine Trading Post. Reliable fittings designed for safety and performance.
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