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 6105-00-811-9223
NSN 6220-00-932-4992
NSN 5910-00-792-8182
NSN 6685-01-094-6455
NSN 6150-01-123-5417
NSN 5985-01-246-0993
NSN 5920-00-773-1282
NSN 5930-01-581-5631
NSN 5960-00-064-2952
NSN 6150-01-461-9323
NSN 5925-00-647-3469
NSN 6685-01-255-0033