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 6645-01-222-7268
NSN 5985-01-054-2345
NSN 5855-01-539-4296
NSN 5990-00-295-0968
NSN 6110-01-127-6491
NSN 6320-01-454-1965
NSN 5925-00-163-3953
NSN 5960-01-043-8414
NSN 6685-01-293-3326
NSN 5910-01-369-9618
NSN 6135-01-041-3829
NSN 5965-01-648-9799