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 6135-01-132-6310
NSN 6145-01-449-8618
NSN 5975-00-061-5668
NSN 6650-00-476-9450
NSN 6130-01-591-6272
NSN 7035-00-922-5700
NSN 6685-00-499-6451
NSN 5996-01-123-9038
NSN 6620-01-177-1772
NSN 5950-00-577-4336
NSN 4140-01-474-7950
NSN 6135-01-577-0811