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 6320-01-039-5891
NSN 6105-00-618-4401
NSN 5915-00-001-3117
NSN 5945-01-127-9864
NSN 6220-00-222-5663
NSN 6610-01-488-7408
NSN 4140-01-213-6162
NSN 7035-00-870-0290
NSN 5965-01-005-0341
NSN 6610-00-141-7000
NSN 5925-01-014-9858
NSN 6135-01-205-5965