Welcome to 
Volko Supply... Online
Servicing Home Owners & Contractors since 1948
A competitively priced full service building supply...Online!
Full service still exists, and here the premium is on service not on price.
  Wow!!!  I found it at Volko...... and they made it easy to order. 

Full Size Copper Weathervanes | Copper Finials | Cupolas | Metal Ceilings | Oak Grilles Vents & Registers | Copper Roof Vents & Flashings | Gutter Accessories | Underground Garbage Cans | Fireplace & Chimney Dampers | Chimney Cap & Covers | Exhausto Chimney Fans | Chimney Chase Surrounds | Draft Inducers | HVAC Duct Fans

Hi!

Here are photos of my self-installed chimney cap.  It came together very well.  I had to re-mortar the chimney top anyway for cracks, so I topped off with extra mortar and inserted stainless bolts using a cardboard template.

Once cured and hardened, fastening the nuts was a snap.  For the cap roof I used nylon lock nuts instead of your regular nuts-- all stainless of course.

Ken
Rodeo, California