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 6240-01-633-9357
NSN 7035-01-482-8608
NSN 5960-01-331-1076
NSN 6145-01-548-7120
NSN 6685-00-419-0643
NSN 5985-01-512-6281
NSN 6220-01-336-0130
NSN 6650-01-484-7095
NSN 5910-01-529-7205
NSN 5960-01-294-2397
NSN 6150-01-240-7340
NSN 5998-01-252-8803