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 5945-01-160-7894
NSN 5935-01-068-3637
NSN 6145-01-118-1417
NSN 5920-00-050-4976
NSN 6645-01-461-8870
NSN 5990-01-267-3590
NSN 5910-01-614-7064
NSN 6240-01-070-5466
NSN 6650-01-220-3842
NSN 5965-00-826-1841
NSN 6240-00-952-1906
NSN 6220-01-435-8860