Six equally spaced protrusions on outter dia
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: Nuts of iron or steel
NSN 5950-01-481-4173
NSN 5910-00-932-9453
NSN 6110-01-032-9172
NSN 6145-00-990-9700
NSN 6145-01-342-9693
NSN 6145-01-462-5714
NSN 5920-01-399-1512
NSN 5985-01-191-5843
NSN 5925-01-145-0074
NSN 4140-01-536-1104
NSN 5996-01-044-2465
NSN 5925-01-335-8933