Dear Sir/Madam,
I would like to order 100,000 number of countersunk fixing manufactured with powder metallurgy method. A general arrangement drawing of the required item has been attached to this email.
Could you please let me know your proposed price and manufacturing lead time at your earliest convenience?
If you have similar fixing in your stock, please send me its drawing and price for my consideration. 
I appreciate your prompt response in advance.
Regards,