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 6110-00-942-0860
NSN 6620-01-426-2220
NSN 6685-00-771-3377
NSN 6610-01-018-1792
NSN 6645-01-160-7707
NSN 7035-01-235-6023
NSN 5945-01-540-4827
NSN 5996-00-444-4333
NSN 6130-01-407-8729
NSN 5910-01-373-7343
NSN 5965-00-238-9870
NSN 6220-01-497-9607