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 6620-01-464-3087
NSN 6110-01-657-3774
NSN 6645-01-204-7094
NSN 5920-00-882-3255
NSN 5960-01-573-6483
NSN 5935-01-297-7994
NSN 5999-00-011-8321
NSN 5855-01-217-4172
NSN 5975-00-942-1925
NSN 6685-00-229-3224
NSN 5985-01-301-9608
NSN 6145-01-105-4431