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 5925-00-710-6642
NSN 5945-01-403-2800
NSN 6650-01-070-1507
NSN 5930-01-657-3720
NSN 6610-01-559-5073
NSN 4140-01-487-4394
NSN 5930-01-517-7349
NSN 6105-00-451-1206
NSN 5905-01-485-3327
NSN 4140-01-415-5595
NSN 5855-01-257-5338
NSN 6110-01-587-1660