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 5905-01-254-8787
NSN 5925-00-059-4991
NSN 5998-01-423-1439
NSN 6685-00-144-6362
NSN 4140-01-103-6293
NSN 5945-01-578-4625
NSN 5855-01-389-8884
NSN 5910-01-560-4230
NSN 5895-00-827-0240
NSN 5975-00-573-3510
NSN 6610-01-018-9122
NSN 5990-00-107-7161