巴西采购需求：六角螺栓，制造商，供应商，经销商，工业紧固件，五金

I'm currently exploring options for fasteners and would love to get more details on your pricing. It's important for us to understand not just the costs, but also any minimum order quantities, available sizes, and material specifications you offer. We aim to ensure that we are choosing a reliable supplier with competitive pricing, so any additional info on lead times and shipping options would be greatly appreciated. If possible, could you provide a breakdown of your pricing structure and any special offers or discounts for bulk orders? Additionally, I'd like to know more about your quality assurance processes and certification, as that is crucial for our selection. Looking forward to your detailed response so we can proceed with our evaluation!