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 5950-00-579-2222
NSN 6620-01-399-3615
NSN 5945-01-176-4514
NSN 4140-01-059-2095
NSN 5895-01-199-2511
NSN 5905-00-594-8102
NSN 6645-01-443-4854
NSN 5960-01-398-4883
NSN 7035-00-250-0982
NSN 6130-01-454-3469
NSN 5945-01-361-9116
NSN 5996-01-032-4942