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 4140-00-715-4016
NSN 6645-01-562-3960
NSN 2925-01-446-6523
NSN 6135-01-617-0253
NSN 5920-00-964-4538
NSN 6650-00-221-9425
NSN 5998-01-584-9719
NSN 6240-01-289-9898
NSN 5985-01-036-3172
NSN 5999-00-303-4624
NSN 6320-01-342-7548
NSN 6130-01-202-9304