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 6685-01-227-0389
NSN 5910-01-341-8418
NSN 5960-01-093-9491
NSN 6650-00-563-3880
NSN 5915-01-210-9132
NSN 5996-01-379-6695
NSN 6650-01-181-6037
NSN 5935-01-163-3283
NSN 7035-00-541-8516
NSN 5855-01-546-2190
NSN 6620-00-658-6588
NSN 6645-01-408-4576