Standard Abrasives 701149, PSA A/O Disc, 1 in x NH, 240, 7010370103 
Insize 4120-52N, METRIC THREAD RING GAGE, NO GO, M52x5, 6928640341939
$219.53
Go and No-Go gages are supplied separately.
Class 6g.
Standard ISO1502.
Supplied with manufacturer inspection certificate.
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