A screw thread specified by M20 x 2.5C as per BIS thread system means
Option (A)
Metric thread of 20mm nominal diameter and 2.5mm pitch having coarse tolerance
Option (B)
Metric thread of 20mm root diameter and 2.5 pitch having coarse tolerance
Metric thread of fine class having 20mm root diameter and 2.5mm pitch
Metric thread of 20mm shank diameter and 2.5mm thread depth with coarse tolerance
Correct Option:
Question Solution:
M(type of thread) 20 (Nominal dia) x 2.5 (Pitch)