Sea Dog 337140-1 Screw Out Deck Plate, 4-7/16" / White

We bought 8 of these to install inspection ports through the top deck of our barge. These are large enough that our two inch trach pump suction hose can fit down them if the basket is removed and a slender arm can reach through them. It would be nice if they made a matching inside ring that could be bolted to pinch your deck material between the two rims.

Used to put access holes in boat. Couldn't expect any better for the price.

Perfect for my use, ok price, thick/quality plastic. Needed an access hatch for an outfeed table vacuum port hole. This covers a necessary hole but gives me quick access when needed by simply unscrewing the cap. Perfect.

I needed to replace a Metric (100mm) dec plate cover. 4" fills the void - though differences in threading do not promote a water tight seal (not critical in may application). Cover and ring appear adequately constructed. The almost-interchangable English to Metric size saved me from more significant repairs. Anecdotally, a 4" cover will screw into a 100mm ring, BUT a 100mm cover is too small to fit securely in a 4"ring.

Seems durable and was the correct size to replace the broken one on my ascend kayak. Only problem I had which was my fault for not paying attention was that I couldn't put my bag down inside because there is no lip for it to sit on but with a little ingenuity I made it work for me.

use it to access my gas tank

nice enough quality but really small. sent it back.

It is just what i wanted color didnt matter to me but they need to tell you which color you will recieve. thats why i didnt give it 5 stars.