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 5990-01-561-7802
NSN 7035-01-417-6261
NSN 5920-01-027-0660
NSN 5935-01-344-9602
NSN 6130-00-422-4837
NSN 6620-00-149-7557
NSN 6685-00-833-8379
NSN 5910-01-641-6613
NSN 6320-00-731-6134
NSN 5895-01-070-5685
NSN 5965-00-208-4896
NSN 5945-00-989-4100