Jic 5 05 ½ 20 14 15. Here are the nut wrench sizes.

Lifeline Essential Torque Wrench Set
An fitting wrench size. The only sure identifier is the thread size. This specification dictates angle threading and the inside and outside diameters of hose the fittings are used in conjunction with. Jegs an combination wrench fits 4an 916 in. Jic fitting end hex wrench size chart aug 26 2019. Hex size fits 8 an nut 6 an socket each 6 part number. If a 716 wrench slips over the threads but a 38 wrench doesnt you have a 4an fitting.
Jic 6 06 916 18 18 20. Jic fitting size dash size thread size torque ftlbs. The number in parenthesis is sae wrench size equivalent. Note that we did not list the hex sizes. Jic 3 03 38 24 6 9. The hex size depends on the fitting type the size of the threads on the other side of the fitting and even the fitting brand.
Hex sizes are not standardized. So a 8 line is a 12 inch line and uses a 78 wrench on the fitting. The line drawings below depict actual sizes of the various common types of fittings hose ends and adapters. That chart tells you the wrench size to use on the fitting. Jic 37 thread size dash identifcation and torque value as follow. That is the size of the line.
Jic 8 08 ¾ 16 27 39. Hex standard to 58 in. An which stands for armynavy sizes represent 116th of an inch. Not what size the line is. Jic 4 04 716 20 9 12. An standard combination wrenches.
Just to clear things up here. In order to preserve the high gloss finish we commend a. Jic 10 10 78 14 36 63. Jic 2 02 516 24 6 7. An fittings come in a variety of standardized sizes based on a long standing military specification. An wrench double ended hose end 78 in.