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 5945-00-833-7745
NSN 5985-01-069-2048
NSN 6650-01-453-2382
NSN 2925-01-372-9455
NSN 5990-01-364-0813
NSN 5855-00-228-8446
NSN 5905-01-285-3417
NSN 6650-01-013-3243
NSN 6645-00-151-5280
NSN 2925-00-968-7795
NSN 6685-01-073-8433
NSN 6620-00-959-6614