Material is copper c2700
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.)
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6240-01-444-3508
NSN 6320-01-108-5933
NSN 5835-01-368-4015
NSN 4140-01-572-1748
NSN 5920-00-189-0858
NSN 5920-01-430-5001
NSN 5990-00-716-7796
NSN 5895-00-778-1713
NSN 6645-01-307-1462
NSN 6610-01-622-4326
NSN 5996-00-060-3289
NSN 6145-01-028-9185