No. 18 spline size
A nonadjustable wrench having a box wrenching feature on one end and an open end wrenching feature on the other end. Excludes wrench, box and wrench, open end.
Classification: Open-end, box and combination open-end and box wrenches, base metal
NSN 5910-00-254-9983
NSN 5950-01-604-0798
NSN 6135-01-324-7718
NSN 5910-01-162-3436
NSN 6130-01-233-4074
NSN 6145-00-291-5388
NSN 5905-00-328-0721
NSN 5935-00-839-1286
NSN 6105-01-648-4431
NSN 5835-01-645-2892
NSN 5945-00-584-2046
NSN 7035-01-340-3272