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 5996-01-242-9433
NSN 5998-01-609-8507
NSN 5855-00-477-9943
NSN 6145-01-283-6491
NSN 6105-00-193-8150
NSN 6240-01-111-5623
NSN 5960-01-123-9553
NSN 5950-01-539-9576
NSN 2925-00-263-2714
NSN 6240-01-032-4237
NSN 5960-01-081-7046
NSN 6620-01-068-4498