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 5905-00-151-6653
NSN 5945-01-576-7201
NSN 5975-01-354-7914
NSN 6645-01-393-5128
NSN 6650-00-921-1037
NSN 4140-01-441-5165
NSN 6610-01-024-3065
NSN 6130-01-537-6607
NSN 5950-01-390-5147
NSN 5990-01-160-6978
NSN 6645-01-076-9310
NSN 5965-01-003-2641