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 6610-01-539-0014
NSN 6610-01-272-2987
NSN 5985-01-094-0099
NSN 5990-01-054-4255
NSN 2925-01-412-9520
NSN 5996-00-066-7451
NSN 5990-00-867-6873
NSN 6685-00-894-6448
NSN 5835-01-364-6830
NSN 5855-00-151-3853
NSN 5925-01-307-5497
NSN 5998-01-254-9594