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 6105-00-782-7586
NSN 5960-00-204-7506
NSN 6150-01-444-9831
NSN 6320-00-456-0836
NSN 6145-00-968-6590
NSN 6135-01-010-0891
NSN 6150-01-289-5268
NSN 6145-01-641-5055
NSN 5950-00-407-2058
NSN 6645-01-123-9277
NSN 5905-00-027-0545
NSN 5895-01-121-3169