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 6220-01-437-9755
NSN 5990-01-364-1942
NSN 5999-01-010-8601
NSN 5985-01-519-3784
NSN 6220-01-068-3100
NSN 6645-00-551-8291
NSN 5855-00-149-0766
NSN 5999-00-584-4577
NSN 5975-01-079-9610
NSN 7035-01-164-2136
NSN 5920-00-078-2132
NSN 7035-01-462-0516