3M 21731, PSA Cloth Disc 348D, 40 X-weight, 6 in x NH, Die 600Z, 7000118906 
Dynabrade 94980 1/4" Composite-Style Coupler, 1/4" Male 
Insize 4131-1A2, AMERICAN STANDARD THREAD PLUG GAGE, 1/2-20UNF, 6928640359026
$101.38
Class 2B.
Standard ANSI/ASME B1.2
Supplied with Go and No-Go gages together
Supplied with manufacturer inspection certificate.
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