030 is 30, which is a number in the decimal system.
.030 inches is equal to 30 thousandths of an inch. This measurement can also be expressed as 30 mils, where one mil equals one thousandth of an inch. In decimal form, it remains 0.030 inches.
A. If the question refers to 0.030 or 0.3: 0.30 is larger than 0.030 B. If the question refers to 0.30 or .3: 0.30 is equal to .3 (They are the same.)
.0030
A ford 302/5.0 will be 306ci if bored .030 (4.030" bore)
0.2