3M 87449 Silver Depressed Center Grinding Wheel, T27 Quick Change, 9 in x 1/4 in x 5/8-11 Center Hub Thread, 7010409732, 20 per case 
Insize 4168-1E, STEEL STANDARD BALLS, 1/8″, 6940561981391
$10.48
To measure angle and diameter of taper holes
Material: tool steel
Hardness: HRC63
Diameter accuracy:?.00012?
Roundness .00004″
Supplied with manufacturer inspection certificate.
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Insize 3293-061, CAN SEAM MICROMETER, 0-.5″, for steel cans, 6928640328497
$140.37
