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 6650-01-624-6959
NSN 5930-01-010-4553
NSN 6130-00-392-5990
NSN 5960-01-031-7992
NSN 6620-00-795-0330
NSN 6645-00-760-5599
NSN 6130-01-190-8962
NSN 5998-01-271-7543
NSN 5910-00-556-6209
NSN 6610-01-171-3010
NSN 6135-01-365-2707
NSN 5965-01-386-8119