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 6320-01-513-9166
NSN 5999-01-365-4148
NSN 5945-00-372-3586
NSN 5975-01-623-6826
NSN 6130-00-690-2273
NSN 5915-01-037-1658
NSN 6150-00-009-5859
NSN 5925-00-077-0406
NSN 5920-00-285-2245
NSN 5950-01-204-4637
NSN 6620-01-652-4349
NSN 5985-01-105-3575