Can RFQs have limited distribution to suppliers of only the Brand I want?

Yes. When you create an RFQ, you can specify if your quote must be brand specific or if you are open to alternates

We know the fastening industry and sometimes, your RFQs must be brand specific. We restrict sellers from offering alternate brands to adhere to your desired results.  However, we also provide you with the option to accept quotes from alternate brands that meet the required specifications if you wish.