It is Pine. Ash is a hardwood and grainy, like Oak. Pine is somewhat soft and easier to nick or dent. Either are good for table legs
If you mean a mounting plate, Yes. Mike
I am not sure you can order 36" length.The longest I managed to buy is 30".
I've had mine for several months and am using them to support a small oak desk with two drawers. Desk dimensions are 48"x20". I estimate the desk' s weight to be 50-75lbs. So far, so good.
Marginal - that is what I bought them for. The leg bolt that screws into the plate stripped out on 2 of them.. Even when properly seated, they wobble a bit for desk use. I am currently looking to add a corner brace or bracket to stabilize.