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 5930-01-381-7739
NSN 6105-00-633-8241
NSN 6135-00-874-6566
NSN 5930-01-556-6870
NSN 6685-01-281-8831
NSN 6110-01-212-2859
NSN 5996-01-187-8283
NSN 5925-00-735-5434
NSN 6610-01-207-0045
NSN 5855-01-213-9076
NSN 5950-00-527-6896
NSN 6240-01-511-3754