most clinserts we sell to you are made to military specification.
please request us at the moment we quote the parts to you if they are military specification or not.

although, in most cases this military spec is not needed, MS means,3B/2A mod. american standard.  Since nobody cared of transferring this to the ISO standard, to be on the safe side, you could state that MS means, it is to 4H/4h or 5H/5h ; however, when you look closely to the tables of american standard thread tolerance you could estimate that 3B corresponds to 4H or 6H or 8H, I could though never find what 2A mod. means (maybe modified) , but you can see what 2A means, so this would mean that it corresponds to 4g, 5g, 6g, 7g or 8g  or rather the range of  5h or 6h

Clinserts comply to the military spec as they are produced to 5H/4h

Industrial Clinserts comply minimum to 6H/6h tolerance

in case you want to have a guarantee that the Clinserts need to be produced according to american standard Inside thread 3B & Outside thread 2A   ; then a minimum of typically 300 pieces is required, request special pricing.