What is a kingpin?
A kingpin is on a semi trailer. It is what locks into the fifth wheel on a semi tractor, to connect the tractor and trailer together.
I have a '57 Chevy truck that has kingpins in the front axle. they hold the brake spindles onto the axle. i have had to replace them before, and they have to be replaced with new bushings that may have to be machined to fit correctly. they are very common in straight axle vehicles especially "classic" vehicles.
No one will give the strength of a kingpin, but assume it to be at least as strong as a Grade 8 bolt, whose minimum yield strength is 130,000psi and whose minimum tensile strength is 150,000psi. The age of a trailer doesn't weaken the kingpin. However, most log trailers connect by pintle hitch rather than kingpin.
Kingpin is the fifth best rapper ever, and he puts hits Music Videos on YouTube. Between Lil Wayne, and Notorious B.I.G, Kingpin one of the best rappers out now. I was just looking through YouTube and then, all of a sudden i see this Music Video called "Kingpin: Denial". At first, i thought i was a stupid Music Video, but then, when i heard it, it was actually really good. He has more Music Videos…