型号
描述
孔径
AT503-10
钻头转接头-1/4"-28螺纹
#10 (0.1935 钻杆尺寸)
AT503-11
#11 (0.1910 钻杆尺寸)
AT503-20
#20 (0.1910 钻杆尺寸)
AT503-21
#21 (0.1590 钻杆尺寸)
AT503-30
#30 (0.1285 钻杆尺寸)
AT503-40
#40 (0.0980 钻杆尺寸)
AT503-70
3/16"(0.1875 钻杆尺寸)
AT503-72
1/4" (0.2500 钻杆尺寸)
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