3M 36271, Stikit Blue Abrasive Disc Roll 321U, 5 in, 320 grade, 7100215956, 100 discs per roll 
Insize 4120-3, METRIC THREAD RING GAGE, GO, M3x0.5, 6928640341373
$61.43
Go and No-Go gages are supplied separately.
Class 6g.
Standard ISO1502.
Supplied with manufacturer inspection certificate.
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