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 5960-01-424-0590
NSN 5935-01-417-2830
NSN 5945-00-138-3486
NSN 6685-00-419-0643
NSN 5990-00-765-1264
NSN 5905-01-350-2348
NSN 7035-00-270-5519
NSN 5925-01-106-2086
NSN 6145-01-562-3451
NSN 5965-00-809-4903
NSN 6145-00-135-0260
NSN 6135-01-226-4071