3M 55657, Stikit Film Disc w/Tab 375L, P240, 6 in x NH, Die 600Z, 7100106615, 250 per case 
Dynabrade 94960 1/4" Composite-Style Coupler, 1/4" Female 
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.
Related products
Air Tool Accessories
Dynabrade 94993 1/4″ Male Composite-Style Coupler with 1/4″ Female Plug Assembly
$42.43