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 6105-01-297-6967
NSN 5996-01-462-8966
NSN 5998-01-528-3992
NSN 5950-01-356-9286
NSN 6110-01-544-6383
NSN 7035-01-268-0933
NSN 5999-00-983-9348
NSN 5945-01-461-8494
NSN 5985-01-060-3635
NSN 6135-00-539-8088
NSN 5985-01-512-0773
NSN 5999-01-591-4575