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 5996-00-026-9118
NSN 5990-01-503-0194
NSN 5905-00-862-2429
NSN 5999-01-586-0847
NSN 6610-01-433-2219
NSN 6685-01-308-8891
NSN 5985-01-461-7717
NSN 6135-00-962-4111
NSN 7035-00-500-7839
NSN 6685-01-063-7425
NSN 6150-00-804-5036
NSN 6130-01-105-1649