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 5985-01-548-8290
NSN 6105-01-543-3650
NSN 6130-01-318-4321
NSN 5925-01-057-0417
NSN 6135-00-334-4500
NSN 6645-01-351-6900
NSN 5985-01-208-8847
NSN 6105-01-381-2496
NSN 6610-01-356-3435
NSN 5895-00-214-9855
NSN 5920-01-486-8238
NSN 6620-00-415-2768