Fasteners surface discontinuities; part 1: bolts, screws and studs for general requirements.
紧固件的表面不连续性。第1部分：一般要求的螺栓，螺钉，螺柱。
Products included are bolts, screws, studs, U-bolts, preassembled screw and washer assemblies (sems), and products manufactured the same as sems except without washer.
产品包括：螺栓、螺钉、螺柱、U型螺栓、预装配的螺钉和垫片组件以及与预装配组件一样加工的无垫圈产品。
We specialize in wholesale supply of screws, bolts, nuts, pins, studs and things of similar kinds.
我们专管批发生意，供应螺钉、螺栓、螺栓帽、别针、饰针等诸如此类的东西。
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