3M 26109, PPS Series 2.0 Adapter, Type S23, 1/4 Female, 18 Thread NPS, 7100135941 
Insize 4120-8, METRIC THREAD RING GAGE, GO, M8x1.25, 6928640341434
$55.47
Go and No-Go gages are supplied separately.
Class 6g.
Standard ISO1502.
Supplied with manufacturer inspection certificate.
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