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 6145-01-145-1867
NSN 2925-01-510-9378
NSN 5835-01-414-3258
NSN 5910-00-499-2570
NSN 2925-00-008-5485
NSN 6135-01-282-4326
NSN 6240-01-326-1841
NSN 6685-00-538-2799
NSN 7035-00-890-0867
NSN 6110-01-146-3769
NSN 5996-01-005-8930
NSN 2925-00-239-9220