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 5895-00-691-6299
NSN 6685-01-123-5608
NSN 6110-00-958-3794
NSN 5930-01-019-4173
NSN 5895-01-531-1974
NSN 5990-01-369-3380
NSN 5915-01-602-5164
NSN 6645-00-222-2785
NSN 6135-00-284-1406
NSN 5985-00-912-8937
NSN 5960-00-275-7497
NSN 5960-01-457-7432