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 6220-01-452-9450
NSN 5855-01-385-4234
NSN 6135-00-027-3914
NSN 6320-00-925-0558
NSN 5975-01-135-3029
NSN 2925-00-411-6324
NSN 6150-01-275-1012
NSN 5855-00-256-5562
NSN 6240-01-152-2662
NSN 5985-01-446-6868
NSN 6645-00-763-4852
NSN 6320-00-841-2279