1.INNER AND OUTER DIAMETER OF AXLE AND ECCENTRICITY OF 8.5 SHALL BE LESS THAN 0.152.THE 5.2 PIN GAUGE SHALL PASS3.FRACTURE STRENGTH SHALL BE MORE THAN 4606N4.FRACTURE STRENGTH SHALL BE MORE THAN 4000N IF USE SHIN NIPPON STEELKEH40P OF PIC MATERIAL5.BEFORE KNURLING OUTER DIAMETER SHALL BE CONTROLED 9.266.BENDING STRENGTH SHOULD BE CHECKED BEFORE THREADING PROCESS