3M 54136, Scotch-Brite Roloc AL Surface Conditioning Disc TR, 2 in x NH A MED, 7100075707, 200 per case 
Insize 4820-330, PITCH GAGE, 4-42TPI, 6928640319242
$15.08
Check the pitch of screw thread.
Accuracy: ?.0028″.
Quantity of leaves: 30
Made of medium carbon steel
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