Since the caliper readings are in reference to zero, a reading of 019 (or, more accurately, 0.019) is the smaller of the two. This reading is "nineteen thousandths of an inch".
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030 is 30, which is a number in the decimal system.
.0030
A ford 302/5.0 will be 306ci if bored .030 (4.030" bore)
0.2
120Improved Answer:-It is simply 030 degrees