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 6130-00-205-1714
NSN 6645-00-012-5834
NSN 5945-00-248-5827
NSN 5985-00-146-0118
NSN 5960-01-025-2526
NSN 5965-01-559-1056
NSN 5855-01-536-9647
NSN 6320-01-515-7913
NSN 5835-00-489-6668
NSN 6650-01-100-0933
NSN 6320-01-624-0193
NSN 6135-00-932-3136