Question

a metric bolt sized m8 - 1.25 x 30 has
a strength grade of b.
a length of 30 mm
30 threads per centimeter
a length of 1.25 cm

Explanation:

In the metric bolt sizing M8 - 1.25 x 30, M8 indicates nominal diameter, 1.25 is the pitch, and 30 represents the length in millimeters.

Answer:

B. a length of 30 mm