"1.500 IN DIA. BOTTOM IS 1.000 IN. HIGH AND BOTTOM IS CHAMFERED 0.375 IN X 45 DEG; STEM IS 5.000 IN. LONG WITH DIA. OF 0.747-0.749 IN. AND HAS SLOT ACROSS TOP END 0.096 IN WIDE BY 0.156 IN. DEEP AND IS CHAMFERED AT TOP 0.060 IN X 45 DEG.; MARKED ON SIDE OF BOTTOM SECTION: FORK VLV 803-5959406 LAPPING TOOL, SEAT"