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 7035-01-353-6861
NSN 6610-00-292-9895
NSN 5915-01-383-7190
NSN 5835-01-170-5537
NSN 5990-01-571-7468
NSN 5935-01-579-9841
NSN 5945-01-265-0230
NSN 6685-01-162-4889
NSN 6145-01-394-3122
NSN 6145-01-552-3576
NSN 5960-01-290-4498
NSN 6320-00-004-9158