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 6240-00-991-6929
NSN 5990-01-243-4233
NSN 6145-01-243-6585
NSN 5915-01-657-2950
NSN 5905-01-067-2939
NSN 2925-01-141-7563
NSN 7035-01-097-5054
NSN 6110-00-636-1234
NSN 6150-01-526-6402
NSN 5996-01-656-9507
NSN 6110-00-015-7688
NSN 5910-00-548-6505