I'm implementing a ISO 9002 system in a detergency factory. I would like to evaluate the transport supplier´s and equipment´s suppliers with a quality contrat. The evaluation will be made with the conformity or non conformity to the terms of that contrat. Do you know where I can get some ideas to write this quality contrat?

You've sorta got me confused. My question to you is what do you want the 'contract' based upon?

In Australia we use AS4000 - General conditions of contract, for guidance as well as AS4911 - General conditions for supply of equipment without installation. Also AS2988 Instrument of agreement - supply of equipment.

These are available at Standards of Australia

However I suggest you approach the National Standards Body (ANSI ?)in your country for similar standards, which would probably be more applicable.