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 6320-01-544-6447
NSN 5996-01-641-2518
NSN 5835-01-299-5055
NSN 5950-01-105-4781
NSN 6135-01-210-8715
NSN 6135-00-161-0746
NSN 5915-00-067-7464
NSN 5950-00-968-3173
NSN 6645-01-347-0450
NSN 5965-01-279-1075
NSN 5930-01-476-8114
NSN 2925-00-800-4685