Plugs and wires

The local auto stores don't carry the Rn12yc plugs. But do carry the rn14yc plugs. Will they work the same?
It's a little hotter plug. If they don't have 'em, tell them to get some. I can grab them at the local farm n fleet. 404 is the box number. Can't believe they don't stock 'em. but I know they could most likely get them over night.