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 5920-01-066-3709
NSN 5855-00-118-8762
NSN 5965-00-400-6228
NSN 6645-01-359-1487
NSN 6650-01-181-4073
NSN 5910-01-220-6501
NSN 5835-00-058-0384
NSN 7035-01-510-8787
NSN 5945-01-149-5128
NSN 6135-01-265-1384
NSN 6650-01-465-5362
NSN 6110-01-059-8599