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 6320-01-090-8296
NSN 5975-01-222-5999
NSN 5905-00-699-7723
NSN 6685-01-528-6345
NSN 6620-01-607-5738
NSN 5915-00-723-8269
NSN 5960-01-299-1765
NSN 6145-01-640-6511
NSN 5990-00-315-9343
NSN 5990-01-594-7470
NSN 5985-01-194-4501
NSN 6320-00-456-0836