3M 45190, Disc Pad Hub, 4-1/2 in 5/8-11 Internal, 7000045659 
Insize 2435-E124, BORE GAGES, measuring depth 40″, range .32-.47″, 6940561947632
$5,271.10
Applicable for .001″ or .0001″ or .00005″ graduation dial indicators.
Carbide contact point and anvil.
Optional accessory: dial indicator or dial comparator, setting ring.
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Insize 0213-A500, INFRARED THERMOMETER, -58?F~716?F/-50?C~380?C, 6940561934700
$79.29