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 6320-01-103-6218
NSN 2925-01-650-3412
NSN 5920-01-389-2077
NSN 6320-00-360-1744
NSN 6685-01-443-4207
NSN 6130-01-003-8041
NSN 6110-01-373-8337
NSN 5925-01-356-4521
NSN 5930-01-004-3953
NSN 5945-01-521-4254
NSN 6150-01-088-2631
NSN 7035-00-803-3056