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 5999-01-415-1835
NSN 5960-01-454-7064
NSN 5975-01-142-6860
NSN 6110-00-231-0776
NSN 5835-00-572-7445
NSN 6685-01-530-6612
NSN 6145-01-510-9570
NSN 6220-01-537-5288
NSN 6240-01-474-6914
NSN 5835-00-532-5910
NSN 5950-01-451-4040
NSN 6320-01-578-6006