Standard Abrasives 530202, A/O Resin Fiber Disc, 7 in x 7/8 in 24, 7010369496 
3M 26130, PPS Series 2.0 Adapter, Type S35, 16 mm Female, 1.5 mm
Thread Stretched, 7100135926 
Insize 1177-300EWL, WIRELESS ELECTRONIC BACK-JAW CENTERLINE CALIPER, .4-12″/10.5-300mm, built-in wireless, 6940561971392
$689.90
Resolution: .0005″/0.01mm.
Measure hole center distance in the same or offset planes.
Buttons: on/off, set, inch/mm, preset (+, -).
Automatic power off, move the digital unit to turn on power.
Battery CR2032
Made of stainless steel.
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3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI Thread, 7100135956
$27.52