螺钉；螺母；铆钉；膨胀螺丝；螺栓；销。
两伸缩柄由硬性材料做成并由铆钉和帽沿固定卡销安装在帽沿上。
Two expansion stems are made by hard materials and arranged on the brim through a rivet and the brim fixed catch.
目前企业可生产的紧固件产品种类包括各类螺栓、螺钉、螺柱、自锁螺钉、自锁螺母、铆钉、销、垫圈以及其他专用件和异型件，涉及300多个标准。
Our products include all kinds of fasteners, such as bolts, screws, studs, self-locking screws, self-locking nuts, rivets, pins and washers with more than 300 standards, and non-standard parts.
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