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 6650-01-604-9073
NSN 6320-00-925-0558
NSN 5835-01-357-1247
NSN 5895-01-067-7957
NSN 5855-00-491-7079
NSN 5998-01-487-5561
NSN 5996-00-160-1772
NSN 6135-01-326-2536
NSN 5925-01-333-2419
NSN 5975-00-312-1410
NSN 6240-01-576-9120
NSN 5960-00-802-5545