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 6130-01-118-2065
NSN 5925-01-248-5666
NSN 5910-00-843-0354
NSN 5996-01-400-1640
NSN 6135-01-193-3892
NSN 5910-01-502-3226
NSN 6620-00-266-2763
NSN 4140-01-164-1192
NSN 6145-00-932-1950
NSN 5945-01-211-6585
NSN 5925-01-515-1378
NSN 6135-00-932-3136