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 6110-00-571-8466
NSN 6220-00-399-7109
NSN 6145-00-301-9124
NSN 6150-00-418-8498
NSN 6105-01-111-8319
NSN 5975-01-252-5866
NSN 6130-00-926-7868
NSN 6135-00-862-5736
NSN 5855-00-010-6492
NSN 5925-00-286-8502
NSN 5985-01-282-8016
NSN 6220-00-764-0404