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 5895-00-553-4459
NSN 5950-00-778-7890
NSN 5975-01-453-4265
NSN 6645-01-281-0389
NSN 6685-01-411-0436
NSN 6645-01-289-2950
NSN 4140-01-585-8374
NSN 6135-00-628-1142
NSN 5835-01-100-3265
NSN 6110-00-852-8003
NSN 6240-00-959-6735
NSN 5835-00-419-6576