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 5985-01-505-6010
NSN 6610-00-591-5028
NSN 5835-01-510-1873
NSN 4140-01-514-7379
NSN 5910-00-490-5078
NSN 5910-01-160-7848
NSN 4140-01-641-1855
NSN 6135-00-062-5080
NSN 6130-00-963-1380
NSN 2925-01-183-2897
NSN 6650-00-904-0085
NSN 5915-00-237-1125