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 6620-01-368-2723
NSN 6110-01-070-9602
NSN 5960-00-138-1651
NSN 6135-00-461-3590
NSN 5945-01-457-0286
NSN 5950-01-322-7376
NSN 6130-01-634-0603
NSN 6110-01-021-9749
NSN 7035-01-088-6415
NSN 2925-00-449-2478
NSN 5960-00-935-6484
NSN 6685-01-555-7938