That's what I thought at first... but it has '014' cast into the side of the nut...
I just reassembled the vise, flipped it over, and worked the screw while watching to see where the play is coming from. Part of it is coming from the nut moving front to back... but there is also play between the front of the dynamic jaw and the c-clip that retains the screw in the jaw...
I think I can fix both issues... if I can get the c-clip out.
I'll try to get both jaw inserts off first, then degrease and derust everything. It's pretty nasty...
-Bear