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 6620-00-190-3385
NSN 5999-01-275-8486
NSN 6110-01-027-7965
NSN 5998-00-325-9007
NSN 4140-01-397-1311
NSN 5905-01-456-3827
NSN 6135-01-193-8154
NSN 5960-00-904-9744
NSN 5996-00-174-8480
NSN 6130-01-222-7684
NSN 5999-00-424-3100
NSN 6135-01-032-8887