Here's a size reference picture. 12.125" tall. Made of 1/2" hot rolled bar and plate. Thread is 1/2"-13 and came on the wing bolt. Tried garage door opener thread stock... (5/8 ths?) too big. Perfect thread is in one of my favorite "C" clamps so I am looking for another C clamp so I can build another vise. Not really for pounding on but sanding and filing. Spring was made of 1/2" stock from a coil spring.
Here's a small vise I made. First image is stuff I was dragging out to make a belt grinder with a 7" wheel off a pallet jack. Second pic is a close up of the vise. Third is how far I got on the belt grinder,today.