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 5950-01-641-1397
NSN 5998-00-966-4272
NSN 6610-01-515-4967
NSN 5999-01-366-7394
NSN 6150-00-170-4039
NSN 5990-00-679-6157
NSN 6620-01-540-8144
NSN 5895-01-634-0630
NSN 6240-01-271-6230
NSN 5950-01-549-9521
NSN 6135-00-295-2614
NSN 5996-01-098-3487