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 6645-01-217-2888
NSN 5996-01-464-0548
NSN 6135-01-142-2417
NSN 5998-00-081-8208
NSN 5915-01-507-1880
NSN 5910-01-352-0917
NSN 5985-00-350-8031
NSN 5905-00-267-3120
NSN 6685-00-309-2210
NSN 5905-00-883-1683
NSN 6320-00-070-4544
NSN 6620-00-957-1352