量针 921
量针是一种测量螺纹中径的工具。
尺寸偏差
0.118,0.142,0.185,0.250,0.291,
0.433,0.511,0.572,0.742,0.796,
0.866,43008,1.457,1.302,1.441,
1.553,1.732,1.833,2.050,2.311,
2.595,2.886,3.106,3.177,3.550,
4.120,4.400,4.773,5.150,6.212