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 5910-01-167-1583
NSN 5905-01-508-5917
NSN 5998-00-548-3191
NSN 5910-01-397-1581
NSN 6685-01-482-3996
NSN 6220-00-753-8593
NSN 6150-00-216-8960
NSN 5930-01-632-1079
NSN 6620-01-148-0901
NSN 6105-00-869-4000
NSN 5855-00-292-5086
NSN 6150-01-563-1144