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 6145-01-606-9382
NSN 2925-01-289-6448
NSN 5996-01-139-2843
NSN 5999-01-377-2050
NSN 5835-01-185-1102
NSN 4140-01-188-2871
NSN 4140-01-100-0743
NSN 5975-00-283-1320
NSN 2925-01-502-9903
NSN 5985-01-013-9044
NSN 5915-01-069-5748
NSN 5910-00-248-6370