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 5999-01-570-3889
NSN 6610-01-529-5709
NSN 5999-01-013-1120
NSN 5950-01-224-5951
NSN 6685-01-108-2411
NSN 6610-01-273-2075
NSN 5835-01-100-3265
NSN 5930-01-088-9605
NSN 6220-01-532-0798
NSN 5835-01-191-3405
NSN 5985-00-242-8375
NSN 5855-00-288-1408