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 6610-01-076-2437
NSN 6130-01-026-5385
NSN 5960-01-323-6432
NSN 4140-01-534-6960
NSN 6685-01-444-2235
NSN 5950-01-197-5916
NSN 6610-01-014-3964
NSN 6620-00-828-3842
NSN 6620-01-012-2852
NSN 5945-01-014-0229
NSN 5855-00-444-2298
NSN 5985-00-940-8781