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 5990-01-287-9447
NSN 6150-01-430-3601
NSN 5915-01-383-7190
NSN 6685-00-180-0349
NSN 5999-01-333-2546
NSN 5998-01-338-1991
NSN 2925-00-330-7316
NSN 6130-01-631-8460
NSN 6610-00-923-6265
NSN 5999-01-454-9392
NSN 5930-01-105-8664
NSN 5945-01-196-6030