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 6150-01-379-5480
NSN 6620-00-363-7528
NSN 5975-00-518-4977
NSN 7035-01-483-1200
NSN 5905-01-065-4069
NSN 6145-01-617-1844
NSN 6320-01-089-9086
NSN 5925-01-536-3867
NSN 4140-00-421-4555
NSN 6240-01-377-5503
NSN 5990-01-253-1332
NSN 6620-01-503-2667