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 6110-01-606-2451
NSN 5990-01-217-4590
NSN 5930-00-057-1941
NSN 6620-01-515-6269
NSN 5915-01-176-7004
NSN 5835-00-185-4919
NSN 5855-00-100-9003
NSN 6135-01-584-0941
NSN 6645-01-580-3258
NSN 6145-01-142-2234
NSN 6130-01-281-6809
NSN 6610-00-104-6800