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 5996-00-311-9302
NSN 5920-01-209-6368
NSN 6135-01-647-0386
NSN 6220-01-053-0681
NSN 6620-01-222-2063
NSN 5925-01-163-6491
NSN 5910-01-179-3755
NSN 5998-01-417-2117
NSN 5975-00-647-4968
NSN 5950-01-052-9854
NSN 5930-00-245-0719
NSN 6145-01-144-9949