You're kind of just stick a bolt or some other untested pin in machine to seal it, even if it fits as they are likely to break in solution. If it is a special environment such as an explosive environment have the class, group and division if applicable. https://gitea.Jewell.one/sabinabond5616/2001lifting-chain/wiki/Rabbit+Handling+Tips+-+It+Should+Be+Done+Correctly+For+Your+Rabbit%27s+Safety.-