澳大利亚采购需求：黑色磷酸盐干壁钉、C型钩头螺钉、盘头开槽螺钉、弹簧螺母、带法兰的六角螺母、M5槽形螺母

I'm looking for bulk quantities of silicon bronze countersunk square drive screws, specifically in 10 gauge and available in three different sizes. Initially, I'd like to order around 2000 pieces of each size, but I'm open to increasing the order if the pricing is competitive. Could you please provide your best pricing details for these screws? Depending on the quotes, I may consider placing larger orders in the future. Looking forward to your prompt reply. Thank you!