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 6685-01-574-4661
NSN 6320-00-228-5678
NSN 4140-00-546-3554
NSN 2925-01-480-3351
NSN 6110-00-456-2058
NSN 5990-00-518-0684
NSN 5965-01-168-3255
NSN 5945-00-778-3033
NSN 6150-01-631-0036
NSN 6150-01-512-0809
NSN 5905-01-443-4002
NSN 5960-00-539-7914