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 6610-00-681-0590
NSN 6685-01-477-0781
NSN 2925-01-519-1247
NSN 6150-01-265-2881
NSN 5905-01-121-9346
NSN 5965-01-213-0338
NSN 6240-00-349-9323
NSN 5945-00-756-5242
NSN 6130-01-054-3234
NSN 6320-00-994-0179
NSN 6650-00-443-4292
NSN 5996-00-826-8837