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 6220-00-885-9425
NSN 5905-01-285-9079
NSN 5998-01-580-2884
NSN 5975-00-583-2960
NSN 6650-01-557-1080
NSN 5985-00-185-5430
NSN 6685-00-391-5747
NSN 5910-01-234-9798
NSN 5999-00-419-0693
NSN 6240-01-184-6831
NSN 5915-00-876-6799
NSN 6110-00-113-1415