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 6135-00-179-8305
NSN 6320-01-411-7456
NSN 5999-01-517-7324
NSN 5965-00-462-6887
NSN 5960-01-506-7039
NSN 5905-01-514-7467
NSN 6685-01-327-4090
NSN 7035-00-763-6180
NSN 6110-01-508-2868
NSN 5920-01-559-7554
NSN 2925-01-376-9236
NSN 6220-01-550-9053