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 5920-01-556-0912
NSN 5975-01-315-5185
NSN 5960-01-251-5995
NSN 5996-01-227-4496
NSN 5935-01-519-2750
NSN 6685-01-630-5459
NSN 6150-01-272-8698
NSN 6150-01-226-7433
NSN 6135-01-475-7415
NSN 5895-01-600-0272
NSN 6320-01-388-3125
NSN 6685-00-654-9912