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 6220-01-431-7319
NSN 6220-01-654-7702
NSN 6110-01-600-7900
NSN 5835-01-580-0446
NSN 6320-01-288-4783
NSN 5895-01-517-0210
NSN 6105-01-644-3291
NSN 5965-01-406-6320
NSN 6145-00-657-4755
NSN 5996-00-776-0164
NSN 5920-01-351-5536
NSN 5910-00-267-9509