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 6320-01-088-1109
NSN 6135-01-504-4309
NSN 5895-01-505-8203
NSN 6240-01-357-7925
NSN 6650-01-381-2972
NSN 5975-00-519-6166
NSN 5996-01-333-9512
NSN 6240-00-682-3508
NSN 5915-01-186-5111
NSN 2925-01-322-9780
NSN 5998-01-116-4673
NSN 5950-00-997-8563