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 5998-01-009-2191
NSN 2925-01-442-4171
NSN 5920-01-378-8521
NSN 5835-00-624-1548
NSN 5975-00-880-5667
NSN 5920-01-570-2714
NSN 6320-01-029-2196
NSN 5985-00-580-4760
NSN 6135-01-010-0891
NSN 5975-00-026-0933
NSN 5920-00-259-7294
NSN 5965-01-186-2051