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 5975-00-734-6243
NSN 5835-00-711-3371
NSN 5905-01-179-3345
NSN 6135-01-255-9129
NSN 5910-00-451-8914
NSN 5996-00-949-0274
NSN 5960-00-064-2102
NSN 6685-00-641-0189
NSN 6645-01-461-7704
NSN 5925-00-908-2843
NSN 6650-01-213-1231
NSN 6105-01-207-2729