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 5996-00-466-9781
NSN 5975-01-061-1133
NSN 6110-00-211-1092
NSN 5975-01-417-3522
NSN 5855-00-407-2801
NSN 6145-01-432-0088
NSN 5915-01-332-7433
NSN 6130-01-596-7623
NSN 2925-00-428-6349
NSN 5905-01-215-1326
NSN 5975-01-511-0701
NSN 6320-01-519-8767