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 6645-01-467-9983
NSN 6110-01-607-8018
NSN 6685-00-276-9889
NSN 6650-00-609-4142
NSN 7035-01-522-9338
NSN 6130-01-461-3530
NSN 6145-01-183-4137
NSN 5950-01-207-0028
NSN 5985-01-167-8785
NSN 5965-01-202-1007
NSN 2925-01-091-4734
NSN 5985-01-261-1669