Ima's nepal cache pattern 1853 rifle musket -as found-

[cantom]

Did you get the nipple out yet?

Are the nipples standard Enfield 5/16-18?

Tend to be dreadfully seized into the holes on these IMA guns?

 

[Claven2]

They are standard Enfield nipples - same as Brit Enfield standard nipples and East India Company musket nipples. Some of them are balls-deep in and tight to boot. I've sometimes had to resort to heat.