印度采购需求：干壁钉，黑色干壁钉，石膏板干壁钉，石膏板干壁钉，粗螺纹黑色磷化干壁钉，干壁钉

I'm looking to source some gypsum drywell screws with specific dimensions for an upcoming project. We need these screws to meet our quality standards and be reliable for our applications. It's important that they come with a consistent supply and competitive pricing. Could you provide the details on availability, lead time, and pricing? Additionally, if you have any specifications or quality certifications for these screws, please share them. I'm eager to understand what you can offer and see if we can establish a fruitful partnership moving forward.