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 6645-01-356-6929
NSN 6110-01-333-6010
NSN 5996-00-124-8666
NSN 6150-01-340-0802
NSN 6240-01-457-7978
NSN 6320-01-381-7023
NSN 6685-01-303-6483
NSN 5925-00-554-4114
NSN 5998-00-862-5511
NSN 5945-00-802-0032
NSN 6685-01-059-1382
NSN 5985-01-660-5858