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 5960-01-275-7552
NSN 6685-01-425-1191
NSN 5835-01-198-2221
NSN 5910-00-842-1216
NSN 5920-01-183-7938
NSN 5930-01-094-6608
NSN 6220-00-221-5899
NSN 7035-01-168-3596
NSN 5905-01-224-7577
NSN 4140-00-526-4505
NSN 2925-00-679-8131
NSN 5835-01-332-2867