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 6150-01-383-4384
NSN 6220-00-183-4066
NSN 5910-01-339-2375
NSN 5965-01-366-5900
NSN 5950-00-683-8304
NSN 4140-01-077-7555
NSN 2925-00-433-5429
NSN 6135-01-470-9738
NSN 6650-01-512-1930
NSN 5950-01-008-7813
NSN 5835-01-462-5983
NSN 5920-00-110-1152