With two grooves 1/4 @in. Wide, 1/16 in. Deep, by 13/16 in. Long, 180 degrees apart. W/two hex socket set screws 3/8-16x7/16 in. Long
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 5996-01-221-1968
NSN 5985-01-513-2182
NSN 5960-00-215-5884
NSN 6145-00-960-7318
NSN 6650-00-876-0152
NSN 6240-01-199-2374
NSN 5915-01-179-3259
NSN 5985-00-905-6175
NSN 5998-00-525-2654
NSN 5910-01-287-8467
NSN 5998-00-566-3090
NSN 6610-01-139-0174