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 5960-01-491-9916
NSN 6685-00-267-9480
NSN 6320-01-195-5583
NSN 2925-01-648-6859
NSN 6240-01-106-6113
NSN 5990-00-195-9460
NSN 5895-00-622-6139
NSN 5910-00-149-0678
NSN 5996-01-194-1719
NSN 5915-00-148-8253
NSN 5855-01-408-1786
NSN 5835-01-482-1591