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 5835-01-359-2575
NSN 5975-01-342-1518
NSN 5985-00-841-1407
NSN 5999-01-432-2737
NSN 5990-01-081-3845
NSN 5925-01-633-2302
NSN 6685-01-341-2161
NSN 5965-01-188-7267
NSN 5945-00-904-7045
NSN 6220-01-172-3620
NSN 5960-00-963-1285
NSN 5915-00-710-0090