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 5998-01-293-3931
NSN 5975-00-307-9419
NSN 5910-00-006-5440
NSN 5920-01-493-7498
NSN 6645-01-111-1144
NSN 5965-01-010-1258
NSN 5905-00-816-4987
NSN 5975-01-417-2996
NSN 5950-01-019-4178
NSN 6105-01-601-6911
NSN 5960-01-386-5770
NSN 6320-01-631-7828