Size: M3 / M4 / M5 / M6. 50 x M4 Rivet Nuts. 50 x M6 Rivet Nuts. 50 x M5 Rivet Nuts. 50 x M3 Rivet Nuts. Material: 304 Stainless Steel;. Color: Silver. Don't need welding nut, riveting firm with high efficiency, easy to use.
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