赞比亚采购需求：内六角螺钉、六角螺母、Gr4六角螺母、Gr6六角螺母、Gr8六角螺母、双头螺栓

I'm looking to procure a specific engineering component that consists of a stud with two locking nuts. The size I need is M30 with a total length of 650mm and a thread length of 115mm on both sides. The material specification is EN19, known for its high tensile strength and durability, which is essential for the intended application. If you could provide me with a quote and lead time for this item, that would be great. Additionally, please confirm whether you have the ability to produce it according to the supplied drawing reference. Any information regarding your manufacturing capabilities and quality assurance processes would be appreciated as well. Thank you!