Do some capacitors come from factory with small bulge on top?

[slackmax]

I removed an oval 10 microfarad 370 VAC oval capacitor from my air handler and I noticed it has a small 1/8 inch diameter bump on the flat part of the end, where the terminals are.   

Is this normal?   It looks sort of like a blob of solder they put there on purpose.

Thanks 

[GilesMM]

Google the model and part number for an image.

[BudgetSlasher]

Not oval, but do you mean something like this?

[slackmax]

Not oval, but do you mean something like this?

Yes and no. The cap in your pic has a man made recess, and some blob on top of the recessed area.

My cap has a blob right on top of the flat area. No man made recess.

I was able to take a fuzzy pic of my cap. See attached.

[slackmax]

Google the model and part number for an image.

Giles, good idea. Thanks. I was able to see some front views of my cap in google, but my computer was not able to go into the websites to see the end view.

I was able to take a pic of the bulge in my cap. See my previous post. 

[BudgetSlasher]

Not oval, but do you mean something like this?

Yes and no. The cap in your pic has a man made recess, and some blob on top of the recessed area.

My cap has a blob right on top of the flat area. No man made recess.

I was able to take a fuzzy pic of my cap. See attached.

I think they serve the same purpose, sealing the last bit of access to the interior of the capacitor at the end of the manufacturing process.

This video https://youtu.be/NSvxE-wyVyg?t=98 talks about welding the hole that is used to fill the oil.