Question

what is least count of screwgauge

Answer 1

at 1mm..
if you want explanation comment

Answer 2

Answer:

0.001 mm

The fundamental distinction between the screw gauge and the vernier calliper is that the screw gauge is only used for external measurements, while the vernier calliper is used for external and internal measurements. The vernier caliper's minimum count is 0.01 mm while the screw gauge's minimum count is 0.001 mm.