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 6135-00-628-1142
NSN 5999-00-482-2202
NSN 5925-00-617-9927
NSN 2925-01-295-9337
NSN 6685-01-521-3950
NSN 5965-01-160-1017
NSN 5999-00-284-4342
NSN 5925-00-844-6984
NSN 6105-01-381-1088
NSN 5895-00-523-5138
NSN 6150-01-451-5135
NSN 6240-00-027-3420