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 6685-01-585-1123
NSN 6220-00-215-0170
NSN 6645-00-359-5463
NSN 5855-01-135-9664
NSN 5965-01-433-5175
NSN 5950-01-647-2620
NSN 6145-01-054-3874
NSN 2925-00-925-0545
NSN 5999-01-481-3744
NSN 5975-01-020-7131
NSN 6130-01-502-9155
NSN 5945-01-535-7037