简体中文标题：六角头螺母.1型。产品等级A和B。

English Name:Hexagon nuts, style 1. Product grades A and B.

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用螺纹联接并起紧固作用的零件称为螺纹紧固件。常用的螺纹紧固件有螺栓、双头螺柱、螺钉、螺母、垫圈等。

Parts with threads used for joining and fastening are called screw fasteners. The most widely used components as screw fasteners are bolts, double screw bolts, screws, nuts, washers.

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螺钉和螺母用装配工具。工程用双头开口扳手。扳手长度和端口厚度。

Assembly tools for screws and nuts - Double-headed open-ended engineers 'wrenches - Length of wrenches and thickness of the heads.

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