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Trailer Hub Dust Cap with a 2.125" Outside Diameter  

Updated 06/10/2020 | Published 06/08/2020

Question:

I have a hub that needs a dust cap. I measured with a ruler and the best I can tell the measurement from inside the hub is 2-1/8 inches. Could you tell me which size I need to order. The other hub is a smaller size. Weird.

1

Helpful Expert Reply:

I have a couple close but not perfect to your measurements. The 2" Lubed Dust Cap & Rubber Plug - 1.99" part # DC200L-DCRP is an extremely common cap size found on a lot of trailers. Sometimes the hub will have a small bevel on them that could easily be 1/16" on each side getting us to the 2 1/8" or I have the larger Zinc Plated Grease Cap - 2.333" Outer Diameter part # TRDC-233 but with this one we are looking at it being almost 1/4" too big. I think that will cause issues with installation. When we get these measurements we use a set of dial calipers and measure inside of the bore about an inch. I really think that the first option is what you're after just take another quick look at it and see if it might be the bevel causing the measurement to be a little big.

expert reply by:
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Randy B
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