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 5975-01-416-3554
NSN 6240-01-181-4474
NSN 5945-01-033-7947
NSN 6150-01-059-8712
NSN 6150-01-584-2510
NSN 4140-01-522-6062
NSN 6645-00-843-5215
NSN 6110-00-583-9821
NSN 5935-00-581-6054
NSN 6135-01-108-6057
NSN 5855-01-028-8387
NSN 5920-01-259-1602