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 6685-00-147-8045
NSN 7035-01-504-8663
NSN 6240-00-931-9654
NSN 6145-01-113-8205
NSN 6130-00-156-7751
NSN 6685-00-333-3500
NSN 5998-01-166-7855
NSN 5945-01-605-1480
NSN 6145-01-335-9310
NSN 7035-01-214-5171
NSN 6620-01-454-2450
NSN 5895-01-468-5582