0aluminum alloy; minor diameter 0.330 in, 15 places; major diameter 0.500, 16 places; threaded hole in one end size 10-32unf-2b, 0.440 in deep; end w/o hole 0.400 india with threads 20unf-1a-lh 0.250 in from end 0.690 in long; length of item 21.430 in