Threaded Fastener Load

With a 5 lb preload, a bolt in a threaded connection experiences an externally applied load of 7 lb. If the bolt’s joint coefficient is 0.3, what is the total bolt load in lb?

Expand Hint
$$$F_b=CP+F_i$$$
where $$C$$ is the joint coefficient, $$P$$ is the externally applied load, $$F_b$$ is the total bolt load, and $$F_i$$ is the bolt preload.
Hint 2
Solve for $$F_b$$ .
The load carried by a bolt in a threaded connection is:
$$$F_b=CP+F_i$$$
where $$C$$ is the joint coefficient, $$P$$ is the externally applied load, $$F_b$$ is the total bolt load, and $$F_i$$ is the bolt preload.
$$$F_b=(0.3)(7lb)+(5lb)=2.1lb+5lb=7.1\:lb$$$
7.1 lb