加拿大采购需求：不锈钢螺母、不锈钢螺栓、螺栓螺母、六角螺栓、六角螺母、紧固件组件

I'm in need of high-quality stainless steel hex bolts, specifically made from 304 grade material. The dimensions I'm looking for are 1/2 inch diameter and 1-1/2 inch length. Could you provide me with your pricing, available quantities, and lead times? Additionally, I'd like to know about any relevant certifications or quality assurance processes you have in place for these products. Thanks!