A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 6645-01-602-7028
NSN 2925-00-992-7904
NSN 6320-00-845-3261
NSN 5920-01-099-5971
NSN 6130-00-256-7934
NSN 5930-01-041-0813
NSN 5960-01-132-2975
NSN 4140-01-157-3700
NSN 6685-01-578-2364
NSN 5996-01-599-6961
NSN 5999-01-354-4498
NSN 5990-01-331-2221