印度采购需求：紧固件、石膏板螺丝、SDS螺丝、自攻螺丝、自钻螺丝、刨花板螺丝

I'm reaching out to request a quote for gypsum screws that meet specific requirements. I'm looking for screws that are 3.5 mm in diameter and 19 mm in length, with a sturdy black finish. These screws will primarily be used for fastening in GP channels, so heavy quality is essential to ensure durability and performance in various applications. In addition, could you provide details on pricing, availability, and lead time for these screws? I'm particularly interested in the minimum order quantity and any bulk purchase discounts. Your prompt response will be appreciated as we aim to finalize our supplier selection soon. Thank you!