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 6150-01-382-3207
NSN 5996-01-068-2886
NSN 6685-01-071-5547
NSN 5960-00-986-5060
NSN 6110-01-229-2486
NSN 7035-01-174-1029
NSN 5975-01-562-8082
NSN 5905-01-106-4480
NSN 4140-01-517-8179
NSN 5990-01-061-5618
NSN 5835-01-463-2334
NSN 5835-00-729-9305