throttle cable throttle housing problem

this may sound stupid but i been running into a problem when i am getting a new throttle housing and almost always the threaded hole for your cable to thread into is larger than the cable adjuster. is there any adapter or what have ya that anyone knows of to fix this problem. the cables i am using are supposed to be oem for the bike and the same with the housing but the housing is almost always just a little to large. any help would be super thanks mark
 
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