3M 45190, Disc Pad Hub, 4-1/2 in 5/8-11 Internal, 7000045659 
Insize 3229-6, TUBULAR INSIDE MICROMETER, 5-6″, 6928640328800
$130.84
Graduation .001″
Carbide measuring faces.
5 to 6″ Range
Accuracy: .00024″
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