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 6220-01-004-8909
NSN 5990-01-116-2181
NSN 5930-00-397-2903
NSN 6110-01-246-5391
NSN 2925-00-115-5857
NSN 5945-01-570-5393
NSN 6645-01-375-2020
NSN 5960-01-512-0233
NSN 6145-01-550-1141
NSN 5855-01-316-6574
NSN 6220-01-276-1004
NSN 5905-01-625-1653