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 6645-00-989-2972
NSN 7035-01-581-2664
NSN 6150-00-067-5957
NSN 5905-01-158-4859
NSN 4140-01-414-1710
NSN 5935-01-437-6686
NSN 6240-01-030-6280
NSN 5905-01-577-0358
NSN 6650-01-564-6681
NSN 6685-01-190-5458
NSN 6320-00-004-9158
NSN 6130-01-505-8152