You have to look at the shoulder profile, etc. to determine a match. I was rebuilding a friends bike with Shimano and the rear cones were pitted. The originals (Wheels Man.) were discontinued (RM005 or something like that). I bought a set of Wheels cones which looked like they would work and had the right measurements. No go, even though they were for the same ball size. When adjusting, once they got close to being tight enough the hub bound up. The LBS had a pair of cones they dug out, that although being 1.5mm short, worked. I put 1mm spacers on both ends and went with that. Too bad Wheels Man. discontinues cones. These were one of the few Shimanos which actually used the same cones on both sides (at least they looked the same).