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 4140-00-009-3586
NSN 6135-01-333-6101
NSN 2925-00-526-4541
NSN 6645-01-099-6887
NSN 5930-01-051-5044
NSN 6150-01-380-6681
NSN 5965-01-422-3232
NSN 6240-01-592-9088
NSN 5905-00-199-1677
NSN 4140-00-232-9859
NSN 5998-00-618-4757
NSN 5930-01-606-3907