From the Anvil Black Receiver Plate for 4inch Cranked Bolt
This is an accessory receiver for 33014 bolt and can be purchased if you loose one.
Black Finish - (For Internal or External Use)
This finish provides an attractive, durable and corrosion resistant coating which will last for many years. Extremely low maintenance option for interior and exterior ironmongery and also resists moisture for use in bathrooms and damp conditions. If used externally or in high moisture areas mechanical components will require the occasional oiling. This finish is first treated with a zinc plate to stop corrosion and then powder coated.