4G6g 1st end thread class thread series designator aerospace iso-mj profile ansi B1.21m with 2 lockwire holes 1.5mm dia; second end 26.87mm id passivate surface treated
w/plastic dust plug; for air dry corporation low pressure air dehydrator, drawing no. 10390-30 coupling assembly npt first fluid end connection thread series
3a 3rd end bulkhead thread class color yellow; pressed in fit restrictor 0.220 in. dia, 0.250 in. lg; chamfered one end 45 deg unjf 3rd end bulkhead thread series