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 5960-01-020-6316
NSN 5925-01-605-1810
NSN 5999-01-071-1721
NSN 6620-01-248-0358
NSN 6135-01-074-8220
NSN 5990-01-047-8168
NSN 5960-01-424-1781
NSN 6110-00-253-1881
NSN 6685-01-382-2996
NSN 5855-01-475-7061
NSN 6645-01-347-0450
NSN 6320-01-054-3046