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 6685-01-284-4540
NSN 5999-01-558-3596
NSN 6135-00-318-8359
NSN 5855-01-108-2044
NSN 2925-01-351-9748
NSN 5855-01-486-7538
NSN 6145-01-491-6785
NSN 5855-01-081-7594
NSN 5999-01-371-2860
NSN 6620-01-032-3937
NSN 5905-01-611-5383
NSN 5965-01-095-9767