Dunno about the '95, but mine was a 10mm with an odd-sized thread pitch (for a Mitsu)... I think maybe 1.50 or 1.75

In order to get it to stop leaking, pick up a stubby flange bolt of the correct pitch (buy one of each because they're cheap) and use a gasket (crush ring) like on the engine oil pan drain plug. The A/T is much more likely to leak without a crush ring in place.