Part number help

This sucks. I remember reading a thread on this forum that contained this information but I can't find it. Don't feel too bad about it though, 'cause during the search I noticed there's a bunch of people in the same boat. Does anybody know what "Retainer, manual brake pushrod PN 2401166" crosses to so I can get one at the dealer? Don't want to buy a master cylinder rebuild kit to get one at a parts store or pay $8.76 shipping for something that could go first class mail for less than 50 cents. I know there are alternatives (1/4" fuel line cut to length or silicone) but this is my brakes and there are drop offs around here like you wouldn't believe. When I was a lineman with Ma Bell we found a car with 2 skeletons inside and the tags had been expired for 3 years. Any help would be appreciated.

Where are you located?