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 6610-00-512-4183
NSN 5990-01-412-9020
NSN 5999-01-312-6214
NSN 5950-01-196-2052
NSN 5985-01-332-7183
NSN 5915-00-818-6300
NSN 6240-01-416-5837
NSN 6645-01-013-3852
NSN 5960-01-577-0628
NSN 6145-01-615-4241
NSN 2925-01-422-9284
NSN 5965-00-079-0928