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 5835-01-349-5420
NSN 5910-00-504-7418
NSN 6645-00-507-5544
NSN 5975-01-058-8901
NSN 6320-00-691-8514
NSN 5895-00-164-7146
NSN 5990-01-426-7350
NSN 5915-01-654-0965
NSN 5965-01-605-0090
NSN 6610-01-265-1824
NSN 6135-01-067-8331
NSN 5855-01-626-6338