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 6150-01-075-1753
NSN 5910-01-016-7028
NSN 4140-01-301-4651
NSN 6645-01-471-4960
NSN 6620-01-562-3862
NSN 7035-01-498-1749
NSN 5965-00-651-4350
NSN 5905-00-013-1250
NSN 5996-01-131-4115
NSN 5895-00-248-7477
NSN 6110-01-467-3871
NSN 5950-01-104-3999