The ZINC plated or BZP type are a cheaper alternative to Stainless, but are not suitable for marine environment.
We sell Screw pin and safety pin style shackles. Our load rated shackles can be used for lifting purposes. These are available in Stainless steel and Alloy steel.
They are available to Bristish standard specification 3032 and FED specification RR-C-271, where lifting requirements are met.