Hello, I looked up and I'm seeing"Compatibility InformationDesigned For Dell PowerEdge R310, R410, R610"However with Ready Rails II A7 rails, it is always best to hear from someone who has actually tried this. [URL]  This is the 8Y19G you have.
Hey all - We've got some Dell servers that we'd like to properly mount in our rack, as opposed to simply having them stacked an resting on a shelf - is there an official Dell kit (similar to the Dell 8Y19G for B6-type Ready Rails) that will allow me to mount my Ready Rails II A7s in our 12-24 threaded hole server rack? For that matter... will the Dell 8Y19G kit work for those? 
Adapter kit to mount Ready Rails II A7 rails into a 12-24 threaded rack?