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 5895-00-361-2609
NSN 2925-01-397-2495
NSN 5965-01-319-5363
NSN 5998-01-046-6738
NSN 2925-00-231-8041
NSN 5990-01-128-7599
NSN 6645-01-559-4934
NSN 6130-01-225-7623
NSN 6610-00-421-9853
NSN 6130-01-019-0823
NSN 6620-00-500-0041
NSN 5930-01-254-3819