Nha is battle welding and cutting kit (m88a2)
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.)
Classification: Other copper screws (not for wood) bolts and nuts
NSN 5925-01-390-8822
NSN 6685-00-269-6444
NSN 6685-00-928-7639
NSN 6610-01-602-9619
NSN 6320-00-343-1798
NSN 5990-01-425-2175
NSN 5915-01-577-0662
NSN 6685-01-449-0062
NSN 6240-00-099-8606
NSN 6135-01-384-7155
NSN 5905-01-514-8416
NSN 5998-01-311-8686