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 5950-00-839-7042
NSN 5985-00-215-0194
NSN 6145-01-396-5647
NSN 6685-01-613-4350
NSN 5905-00-151-4762
NSN 5945-01-651-8654
NSN 5975-01-370-1223
NSN 4140-00-150-8265
NSN 5905-01-298-3601
NSN 6145-01-208-3678
NSN 6620-01-532-9023
NSN 5960-00-545-8786