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 6130-00-678-7543
NSN 5999-01-516-0461
NSN 6610-01-272-9691
NSN 5915-00-235-9420
NSN 6320-01-519-8767
NSN 6620-01-022-4104
NSN 5960-00-104-5955
NSN 6650-01-114-9514
NSN 5945-01-006-9422
NSN 5910-01-152-3900
NSN 5895-00-354-1614
NSN 5930-01-103-3576