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 5945-01-142-1053
NSN 6110-01-326-2541
NSN 6650-01-264-7227
NSN 5950-01-487-3750
NSN 5925-00-592-0881
NSN 5835-01-138-4747
NSN 7035-01-434-0606
NSN 6150-01-643-4411
NSN 6130-01-095-5573
NSN 5835-00-642-8148
NSN 6685-01-432-2579
NSN 5855-01-286-2916