Used on compressor, turbo mnch 364-51227-000. (navy) ring, impeller eye seal mchn-52 stepped style ring with highest step to the inside; outside flage area has one thru hole of 0.389 to 0.398 inch duiameter, located cnntered 3.510"x from center of ring; diameter of ring is 7.640"; first step is 6.928 inch diameter; second step is 6.300 inch diameter; fourth step is 6.020 inch diameter; fifth step is 5.626 inch diameter; thickness is 0.609"; second step is 0.293"; third step is 0.353"; fourth step is 0.482"; fifth step is 0.609"