Dynabrade 98263 3/8" NPT Male Plug 
Insize 4131-5C1, AMERICAN STANDARD THREAD PLUG GAGE, 5/8-11UNC, 6928640359040
$139.50
Class 2B.
Standard ANSI/ASME B1.2
Supplied with Go and No-Go gages together
Supplied with manufacturer inspection certificate.
Related products
Air Tool Accessories
Dynabrade 94991 1/4″ Female Composite-Style Coupler with 1/4″ Female Plug Assembly
$44.05