Yongji Group operates professional cold heading production lines in Suzhou and Vietnam bases, specializing in mass production of standard screws, nuts and custom special-shaped fasteners. We provide full in-house processing including heat treatment, grinding & cleaning, thread rolling and pre-applied anti-loose adhesive without outsourcing. With stable mass production capacity and mature process system, we undertake bulk and customized fastener orders for 3C, automotive, energy storage, communication and other industries with reliable quality and controllable delivery.