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 6150-01-502-9532
NSN 5950-01-516-7060
NSN 5998-01-581-6073
NSN 5905-01-453-5773
NSN 7035-01-202-8172
NSN 5996-00-011-5651
NSN 5998-00-173-4443
NSN 7035-00-916-9380
NSN 5855-00-763-2155
NSN 5920-01-061-3158
NSN 6620-00-078-1040
NSN 5945-00-201-9726