I am always challenged reading these dimensions on these drawings. What the heck is the drill size? They are LED holders for 3mm LEDs.

 

5mm would be my guess.
Max.

 

5mm would be my guess.
Max.

Is that a guess based off of the dimension of the outer ring? That 5 mm on the drawing is the depth of the thing right? There really is nothing to indicate drill size correct?

 

No, it shows it at the rear as the push mount dia (5mm), once push mounted the rear compresses and the holder is mounted, it cannot be smaller than 5mm and larger with make it sloppy, once mounted.
You can always sacrifice one for a test run.!
Max.

 

No, it shows it at the rear as the push mount dia (5mm), once push mounted the rear compresses and the holder is mounted, it cannot be smaller than 5mm and larger with make it sloppy, once mounted.
You can always sacrifice one for a test run.!
Max.

Still not seeing that dimension. Would you mind marking it? I really need to learn to read these damn things.

 

No I erred some of these have a back retainer, not shown, what is the part No/source of these.
Max

 

I have something in stock similar and it's about 4.5mm OD

 

No I erred some of these have a back retainer, not shown, what is the part No/source of these.
Max

They are snap in.

https://www.mouser.com/Search/ProductDetail.aspx?R=C-104virtualkey65330000virtualkey749-C-104

 

Found the full instructions on the DigiKey site, it shows a .176" dia panel hole, (4.47mm).
Max.

 

..... which is approx 11/64" in old money.

 

4.5mm not used much but are available easily enough

china is metric

 

The nearest drill is #16. (.177").
https://littlemachineshop.com/reference/numberdrillsize.php
Max.

 

That is a very strange drawing. The one dimension that is critical isn't even shown. That dimension is, the straight part between both end, that would be the drill diameter. The end dimensions are what keeps it captive in the hole.

 

That is a very strange drawing. .

Clearer version.
Max.

 

As a machinist that's what I would have expected to see, on a blueprint.