Dynabrade 98270 1/2" Male Coupler 
Insize 4131-1B2, AMERICAN STANDARD THREAD PLUG GAGE, 1/4-28UNF, 6928640358951
$91.85
Class 2B.
Standard ANSI/ASME B1.2
Supplied with Go and No-Go gages together
Supplied with manufacturer inspection certificate.
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