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 6145-01-231-9169
NSN 5905-01-268-0498
NSN 5855-00-228-8446
NSN 6240-01-431-5790
NSN 6650-00-907-8565
NSN 6135-01-502-5787
NSN 6110-01-385-7177
NSN 5925-01-253-0066
NSN 5910-01-505-9276
NSN 5985-01-610-6951
NSN 6610-01-617-6495
NSN 6650-01-346-7678