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 5999-00-673-5546
NSN 6130-01-563-0520
NSN 5950-00-078-6175
NSN 5998-01-619-0716
NSN 5915-01-297-0818
NSN 5910-01-431-0558
NSN 5975-01-497-7710
NSN 5855-01-519-3814
NSN 5910-00-844-3214
NSN 5999-01-542-3494
NSN 5895-01-099-4041
NSN 6145-00-299-6417