坦桑尼亚采购需求：六角螺栓、六角螺母、高强度螺栓、高强度螺母、内六角螺栓、锁紧螺母

I'm looking to source some fasteners for our upcoming projects. Specifically, I need a good quantity of bolts, nuts, nylon nuts, flat washers, and screws. It would be great if you could provide specifications for these items, including any variations in materials, finishes, and sizes available. Additionally, please share your pricing information and lead times for delivery. If you have minimum order quantities or any special offers, I'd love to know about those as well. I'm keen to establish a reliable partnership, so any details about your production capacity and quality assurance processes would be very helpful too. Thanks!