12 serrations on side opposite bearing surface and 6 notches 0.078 in. W by 0.040 in. Deep spaced alternately with serrations
A nut, round in shape, having all or part of its outer surface knurled. It may have provisions for external wrenching. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, round. (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 6645-01-209-6881
NSN 6130-00-110-9029
NSN 6130-01-113-6715
NSN 7035-01-628-5662
NSN 5950-00-636-4290
NSN 5960-00-839-1529
NSN 5835-01-485-1408
NSN 6320-01-384-7079
NSN 5915-01-633-2641
NSN 6150-00-269-5017
NSN 5920-01-374-9244
NSN 5930-00-930-6035