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 4140-00-126-4685
NSN 5990-01-242-9653
NSN 5990-01-599-7106
NSN 6135-00-078-9931
NSN 6320-00-194-4252
NSN 4140-01-592-7466
NSN 5920-01-341-6741
NSN 5925-01-283-9588
NSN 5965-01-222-1420
NSN 5905-01-605-1569
NSN 6320-01-578-6006
NSN 5905-01-254-2741