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 7035-00-731-8729
NSN 5905-01-549-8037
NSN 5990-01-630-5094
NSN 6320-01-219-5174
NSN 7035-01-319-7066
NSN 5960-00-955-0012
NSN 5905-00-924-9391
NSN 5910-01-261-5620
NSN 6685-01-339-1227
NSN 2925-01-527-1207
NSN 5855-00-014-5008
NSN 6650-01-651-3713