Three 1-1/4” x5tpi acme threaded bronze lead screw nuts 1.558” dia x 1-7/16” long 0.180” keyway 2x left hand thread 1x right hand thread. They look very similar to the nuts H&W sell for Bridgeport refurbs but they don’t post their dimensions so I can say for sure. Unused, best as I can tell but with some dings, dirt and shelf wear.