A circular cross$-$section Oring has the dimensions shown in the figure. In particular, an AS $568$A standard No$.240$ Oring has an inside

diameter $D_i$ and a cross$-$section diameter $d$ of

$D_i=3\mathrm{.}400+-0\mathrm{.}020in$

$d=0\mathrm{.}148+-0\mathrm{.}0039in$

Estimate the mean outside diameter $\frac{?}{\text{b}\text{a}\text{r}}(D{)}_o$ and its bilateral tolerance. $($Round the final answers to three decimal places.$)$

The mean outside diameter is

in$.$

The bilateral tolerance for the mean outside diameter is

$|$in$.$