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 5998-01-101-4733
NSN 5920-01-386-5798
NSN 6110-01-454-9390
NSN 6220-01-095-0117
NSN 5905-01-534-5964
NSN 6685-01-213-5161
NSN 5999-01-335-1379
NSN 5905-01-096-2426
NSN 6145-00-657-4755
NSN 5998-01-646-8700
NSN 5835-00-198-4936
NSN 5999-01-322-3966