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 6620-00-280-2874
NSN 6645-00-102-0015
NSN 5905-01-454-1977
NSN 6135-00-497-0491
NSN 5905-00-932-8332
NSN 5930-01-644-4536
NSN 2925-01-157-9204
NSN 6685-01-021-0134
NSN 5855-00-361-0167
NSN 2925-01-474-3363
NSN 5998-01-644-9020
NSN 6130-01-531-3989