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 5915-01-471-3487
NSN 5855-01-115-9014
NSN 6685-01-655-0403
NSN 5960-01-375-6815
NSN 6645-00-192-1152
NSN 6650-01-397-1925
NSN 6105-00-111-0851
NSN 5965-00-405-3793
NSN 6150-01-038-2897
NSN 2925-00-806-7972
NSN 5935-00-775-1500
NSN 5999-01-205-7533