The number 47.875 is a very typical dimension in inches (it equals 47 and 7/8 inches). Millimeters would be a whole number or one decimal place for manufacturing, not a three-decimal-place fraction like this. The tolerances of 0.5% are standard for imperial engineering drawings. So, your reference is: 47.875 Inches.

The number 47.875 is a very typical dimension in inches. It equals 47 and 7/8 inches. Millimeters would be a whole number or one decimal place for manufacturing, not a three-decimal-place fraction like this. The tolerances of 0.5% are standard for imperial engineering drawings. So your reference is 47.875 inches.