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 6610-01-288-2339
NSN 6620-01-632-2154
NSN 6240-00-269-3346
NSN 5999-01-517-7842
NSN 6620-00-604-7566
NSN 6610-01-417-3011
NSN 6685-01-511-0977
NSN 6685-01-495-2306
NSN 6150-01-336-3028
NSN 5985-00-533-0659
NSN 5925-00-792-9073
NSN 6685-01-501-3970