Required information

The figure shows a fluid$-$pressure linear actuator $($hydraulic cylinder$)$ in which $D=4in,t=\frac{3}{8}$ in $,$

$L=12$ in $,$ and $w=\frac{3}{4}$ in$.$ Both brackets as well as the cylinder are of steel. The actuator pressure

oscillates between $900$ and $2,100$ psi. Six $\frac{3}{8}-$in SAE grade $5$ coarse$-$thread bolts are used, tightened

to $75$ percent of proof load. Assume the bolts are unthreaded within the grip. Assume that the entire

cylinder is compressed uniformly and that the end brackets are perfectly rigid.

What pressure would be required to cause total joint separation? $($Round the final answer to three decimal places.$)$

The pressure is

kpsi.