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 5905-00-644-9983
NSN 6130-01-530-4812
NSN 5925-01-500-1352
NSN 6145-01-183-4137
NSN 5996-01-194-1204
NSN 5990-01-503-0194
NSN 5835-00-739-5282
NSN 6130-01-158-7724
NSN 6135-01-125-4867
NSN 5925-01-537-2443
NSN 6645-01-115-4953
NSN 5920-00-215-5642