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 5996-01-432-1145
NSN 5925-01-010-2925
NSN 5950-00-135-7784
NSN 5895-01-083-3629
NSN 5855-01-502-5141
NSN 5925-01-045-3805
NSN 6610-01-438-4383
NSN 6650-00-450-9893
NSN 5935-01-557-5599
NSN 6685-01-529-6990
NSN 5960-01-539-1956
NSN 6645-01-363-9790