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 6650-01-100-6560
NSN 5905-01-513-2856
NSN 5855-01-052-0353
NSN 6320-01-436-0513
NSN 6240-00-372-4841
NSN 7035-01-592-5470
NSN 5965-01-113-9061
NSN 5910-01-471-0133
NSN 5996-00-432-6816
NSN 6220-01-592-0078
NSN 6145-01-035-7527
NSN 5996-01-125-5781