3M 76624, Roloc Disc 777F, 60 YF-weight, TR, 1 in, Die R100N, 7000045620 
Insize 4120-56, METRIC THREAD RING GAGE, GO, M56x5.5, 6928640341632
$307.81
Go and No-Go gages are supplied separately.
Class 6g.
Standard ISO1502.
Supplied with manufacturer inspection certificate.
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