The hacksaw will often damage the last thread when it cuts. Running a nut off the end will fix this. You'll have to run the nut all the way down from the other end. This doesn't take long, if you chuck up the rod in your drill and let it do the work. Hold the rod vertically, with the drill pointing down, and just hold on to the nut enough to keep it from spinning.

Whether you’re setting up a new shop or upgrading your old one, a good, sturdy workbench will almost surely be central to your plans. We can help. Our editors and contributors have produced more than two dozen articles and videos about benches and assembly tables. We’ve included everything from a simple but workable plywood bench to a classic hardwood bench complete with vises. You’ll also find full project plans, as well as tips for installing vises, making your bench portable, adding storage, and more. Some of our workbench plans are free, and the rest can be purchased in our store (check the links below).
To mark the centerline, set a compass to span something more than half the width of the leg. Draw an arc from corner of the leg. The point where the arcs intersect will be on the centerline. With a centerline point on each end of the leg, place a scribe on the point, slide a straightedge up to touch the scribe. Do the same on the other end. When you have the straightedge positioned so that you can touch both points with the scribe, and in each case it is touching the straightedge - without moving the straightedge - scribe the line. Use scribes, rather than pencils or pens, because they make more precise marks.
I’ve built workbenches with more than 100 students. In every class, there’s one guy who wants to put a vise on every corner of the bench. Not because it’s a partner’s bench for two people. Just because he wants it that way. While I support your freedom to choose, I also don’t want to spend two weeks installing complex tail-vise hardware on your bench when we could be building furniture instead.
Remove the jaws and route the edges that you could not route while they were still attached. Then use a roundover bit on all of the corners except the inner edge of the inner jaw of the end vise. Give everything a lite sanding, and apply Danish oil to the inner surfaces of the jaws. (By "inner surfaces", I mean those surfaces that will not be accessible when the vises are assembled - the inner surface of the inner jaw, that bolts to the bench, and the outer surfaces of the outer jaws, that bolt to the vise plates.)

Grizzly is a company currently undergoing an upheaval. This brand was once known as a manufacturer of professional grade tools and equipment for woodworking products. Though, in recent years, that reputation has begun to slip a bit since being bought by the Chinese company SIEG. These days, whether the Grizzly product stands up to its previous standards of excellence often has more to do with what you are buying than the company itself.