Black oxide
A tubular item, so formed as to provide a spring action against the inside wall of a hole when driven into abutting pieces to position and hold them in place.
NSN 5945-01-237-3228
NSN 5855-01-069-4742
NSN 5930-01-508-1029
NSN 7035-01-432-2424
NSN 5996-01-153-2359
NSN 5855-00-586-6255
NSN 5998-01-277-6832
NSN 6620-01-645-1777
NSN 6135-00-519-1325
NSN 4140-00-231-1475
NSN 5950-01-589-0085
NSN 5998-00-248-2791