抽油泵螺纹量规940 941/Thread Gauges for Oil Sucking Pumps 940 941

抽油泵螺纹量规是抽油泵中圆柱螺纹的检具，具有对螺纹各项参数如大、中、小径、螺距、牙型半角综合检测的功能。环、塞规的规格均为（0.75-4.238）英寸，精度等级为3A，3B。

The thread gauges for oil sucking pumps are a measuring tool for testing the cylindrical thread of oil sucking pumps,and they have the function of comprehensively testing all parameters of the thread such as major,pitch and minor diameters,pitch of thread,profile semiangle,etc.The sizes of both ring and plug gauges are 0.75-4.238 inches,the grade of accuracy are 3A and 3B.