Here’s a screen shot of a Crosby Shackel chart. For some reason I couldn’t post a link.
Two things to note here:
1. You are looking for a 5/8 shackle. This size shackle will USUALLY have a 3/4” dia. pin
2. Buy Crosby!!! Not smittybuilt, Harbor Freight, no name, etc. Spend the $ and get the real deal.
There are other quality makers out there but Crosby is what I’m familiar with.
I can’t stress this enough, your life may depend on it.
In the pic we are removing a ballasted, 1 Ton truck, from a three axis road simulator.
The simulator is basically a means of replicating road events (bumps) using servo hydraulics. It allows you to speed up suspension and body testing without using a driver. Not a complete replacement for real world testing just another tool.
We would prep the vehicle for test on the hoist in you can just see in the foreground of the above picture. Then we would “fly” the test truck, via the two beams, into the test cell and connect it to the simulator at the wheel hubs.
The picture was just to show the rigging attached to cradles and it’s complete reliance on quality shackles.
I should have provided more explanation.
We use Crosby for the most part but also Cambell, both made in USA. Agree 100%, do not buy off brand/chinese shackles, there is little to no quality control and if they break very bad things can (and usually do) happen......