1aluminum alloy bar, rod, shapes, and tube, extruded, 6061-t6, per specification qq-a-200/8; 5.000 in. Outside dia; 8.813 in. O/a long; 4.900 in. Inside dia. Of first end; 1.626 in. Inside dia. Of second end; item used on m207e1, f/tow guided missile bgm-71a