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 4140-01-050-8096
NSN 7035-01-112-1054
NSN 6620-00-102-3950
NSN 6620-00-010-8190
NSN 2925-01-633-4048
NSN 6220-01-478-1247
NSN 5910-01-296-2171
NSN 6110-01-400-4207
NSN 6645-01-201-5802
NSN 5965-01-194-3453
NSN 6240-00-204-9355
NSN 6685-00-088-9462