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 6685-01-226-8645
NSN 4140-01-043-8556
NSN 5895-00-904-2640
NSN 5920-01-110-7491
NSN 6135-00-209-6918
NSN 6150-00-764-3695
NSN 5965-01-005-0341
NSN 6620-00-147-1014
NSN 5910-01-122-3205
NSN 6645-01-076-4655
NSN 5996-01-442-7354
NSN 6105-01-381-2496