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 5999-01-571-6000
NSN 5990-00-931-6304
NSN 6685-00-726-5430
NSN 6145-00-864-7881
NSN 5925-01-457-7605
NSN 5996-01-201-7741
NSN 5905-00-966-5680
NSN 6685-00-460-4906
NSN 6220-00-707-5044
NSN 6130-01-514-7733
NSN 5895-01-641-9264
NSN 5950-01-653-4800