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 5990-01-068-1651
NSN 5965-00-653-4782
NSN 5915-01-410-7822
NSN 5895-01-031-8460
NSN 6320-01-478-9351
NSN 6150-01-069-5285
NSN 5925-01-609-0631
NSN 6130-01-613-6199
NSN 6610-01-333-7869
NSN 5960-01-179-4009
NSN 6110-01-297-8066
NSN 5985-00-984-5243