Do not dupe to nsn 5310-00-903-5966; this nsn is for pearl harbor use only; this is a non-standard unit-of-issue
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 6130-01-214-4620
NSN 5999-01-206-9450
NSN 6130-01-243-0380
NSN 5960-00-258-9292
NSN 5915-00-269-9252
NSN 5960-01-491-9916
NSN 4140-00-053-1840
NSN 5920-00-131-8101
NSN 5996-00-483-8348
NSN 6240-01-515-1553
NSN 5855-00-149-0766
NSN 6685-01-368-0419