The first end thread type is jic.
An adapter having standard pipe threads on one end or an unthreaded end designed to accommodate a pipe. The other end has machine threads (straight threads other than pipe or hose series) designed to accommodate a tube or is unthreaded and designed to accommodate a tube. It is designed to join a pipe or pipe fitting to a tube or tube fitting in a straight line.
NSN 6645-01-607-7931
NSN 5965-01-643-0703
NSN 6150-01-640-9359
NSN 5925-01-596-0292
NSN 5960-01-304-3073
NSN 5935-00-100-7204
NSN 5925-01-366-1915
NSN 5985-01-167-7708
NSN 6110-00-539-9543
NSN 5855-01-348-4623
NSN 5895-00-844-2954
NSN 6135-01-420-5907