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 7035-01-514-2221
NSN 6135-00-927-5848
NSN 6685-01-067-1447
NSN 5996-01-412-1396
NSN 5996-01-198-0117
NSN 6650-01-312-3467
NSN 5996-01-015-9539
NSN 5895-01-660-1365
NSN 6685-00-120-0962
NSN 5996-00-591-2241
NSN 5920-01-535-0796
NSN 6135-01-549-5587