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 5920-01-230-6511
NSN 5998-00-905-6772
NSN 6645-01-050-4048
NSN 6320-01-462-2295
NSN 5999-00-809-4560
NSN 4140-01-494-0339
NSN 5975-01-453-4778
NSN 2925-00-589-7640
NSN 6110-00-118-1260
NSN 6620-01-401-5356
NSN 6610-01-446-7635
NSN 5999-01-550-8060