Steel 1015/1022; rockwell a78/a82; chromium-plated; 16.625 lg; taper to 2.000 from 3.480/3.483 diameter 4.500 from end; 1.781/1.796 diameter hole at taper start; oil grooves with cotton wick 4.25 to 8.75 from head; coaxial hole 0.718/0.734 diameter 9.750 from end; wool waste in hole; 0.500-14npt in hole