## Threaded Fastener Load

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

##
__
__**Expand Hint**

**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**

**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

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