With triangular base on bottom ofnut with 3 each drilled holes 0.070 inch id by 0.125 inch long by 0.105 inch thick
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 5910-00-973-6997
NSN 6645-01-322-8897
NSN 5996-01-348-2381
NSN 6220-00-338-1086
NSN 5930-01-508-3434
NSN 5835-00-630-0897
NSN 5920-00-932-9615
NSN 6650-01-242-8086
NSN 2925-00-943-2263
NSN 2925-00-328-2018
NSN 6105-00-111-3353
NSN 5998-01-650-6369