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 6150-00-772-4669
NSN 5990-01-040-1320
NSN 6620-01-431-9176
NSN 5915-01-432-2491
NSN 6220-00-058-5002
NSN 6610-01-590-7222
NSN 7035-01-544-2502
NSN 6620-01-034-7636
NSN 6135-01-265-1384
NSN 2925-01-270-1124
NSN 6320-00-025-9910
NSN 6135-01-328-0639