3M 26054, PPS Series 2.0 Adapter, Type S18, 3/8 Female, 18 Thread NPS,
4 per case 
Dynabrade 98263 3/8" NPT Male Plug 
Insize 4130-52, METRIC THREAD PLUG GAGE, M52x5, 6928640340215
$180.23
Supplied with Go and No-Go gages together.
Class 6H.
Standard ISO1502.
Supplied with manufacturer inspection certificate.
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