3M 26104, PPS Series 2.0 Adapter, Type S20, 1/8 Male, 27 Thread NPSM, 7100135929 
Dynabrade 95677 1/4" Male Plug with 1/4" NPT Female Thread 
Insize 4644-1H12, NPT THREAD PLUG GAGE, 1-1/2×11.5NPT, 6928640346880
$353.52
NPT THREAD PLUG GAGE, 1-1/2×11.5NPT
Related products
Air Tool Accessories
Dynabrade 94990 1/4″ Female Composite-Style Coupler with 1/4″ Male Plug Assembly
$42.31
Air Tool Accessories
Dynabrade 94992 1/4″ Male Composite-Style Coupler with 1/4″ Male Plug Assembly
$46.24