Next higher assembly is a cvi air drive pump
No other part numbers with same form, fit, and function found.
A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5905-01-097-7189
NSN 6150-00-779-4309
NSN 6645-00-232-4070
NSN 5910-01-507-1197
NSN 6110-00-614-9218
NSN 5990-01-642-1668
NSN 6320-00-228-5678
NSN 6610-01-411-3372
NSN 6150-00-299-6678
NSN 5960-00-387-6377
NSN 6645-00-922-8312
NSN 6240-00-107-1518