Steel; flanged on one end; 7.630 in. Diameter of flanged end; 2.250 in. Diameter of bore at flanged end; flanged end internally thd; 2.000-16 un-3b thd; 1.378 in. Diameter of bore at second end; 4 thd holes in flange countersunk 90 degrees apart to 0.410 in. Dia; holes thd 0.375-16 unc-2b