Question

The diameter of the best wire to measure the effective diameter of a metric screw threads of 0.5 mm pitch is mm

• A. 0.28

Answer 1

The correct option is A 0.28
$\text{In Metric thread, angle of thread}{60}^{\circ }$

$\text{Best wire size to measure diameter}$

$=\frac{0.5}{2}sec\frac{\alpha }{2}=\frac{0.5}{2}sec{30}^{\circ }$

$=0.28mm$