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 5895-01-657-5755
NSN 5910-01-011-6206
NSN 5990-01-525-2250
NSN 5950-01-365-2334
NSN 6240-01-592-4068
NSN 5965-00-161-1512
NSN 5915-00-035-4462
NSN 6645-01-157-9080
NSN 6145-01-139-6557
NSN 5990-01-071-1505
NSN 6130-01-358-2615
NSN 5895-00-104-8294