6cylinders

What are these commonly called?
I went to NAPA the other day and told them 1703 hubcap for a semi trailer.
They didn't know what I was talking about.
I guess I could print the pic and take that but I thought there is a common name they will recognize?

MikeyB

Back in my day we called them the Stemco wet hub cap. Best to take a picture in for parts guys that are not familiar with over the road tractor and trailer parts.

6cylinders

Photo is turning into a good idea!
I'm not that familiar with these, I thought I was just out of the loop but I'm guessing they are not that common anymore.
Thanks!

Hillbilly66

These are common, there are a few different sizes. Sometimes you have to tell them it's an oil bath hub, and you need the cap that keeps the oil in, then they might bring you a couple to choose from.

Sounds like your napa guy is out of the loop, which happens if the store is in an area that doesn't do much commercial business, or if it's an inexperienced person behind the counter.

Either print the picture or take one with your phone is your best option to get what you need.