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 6610-01-449-8754
NSN 5920-01-070-4601
NSN 5990-01-414-7618
NSN 6220-00-482-7544
NSN 6320-00-908-6841
NSN 5895-01-608-3588
NSN 6240-01-578-2334
NSN 6620-01-026-0346
NSN 6240-01-421-9388
NSN 5999-00-548-1976
NSN 5935-00-167-8028
NSN 6320-01-571-8974