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 5999-01-309-2393
NSN 6685-01-544-0893
NSN 5985-00-008-6754
NSN 5985-01-541-4305
NSN 5950-00-969-6560
NSN 6130-01-626-9375
NSN 5950-01-533-8088
NSN 5990-01-123-6557
NSN 6650-01-618-4176
NSN 5905-01-299-3457
NSN 5996-00-941-6269
NSN 6130-01-382-8000