20pcs x M3 Threaded Rivet Nut Inserts. 20pcs x M4 Threaded Rivet Nut Inserts. 20pcs x M5 Threaded Rivet Nut Inserts. 10pcs x M6 Threaded Rivet Nut Inserts. 10pcs x M8 Threaded Rivet Nut Inserts. Size of nut rivet mandrels: M3/M4/M5/M6/M8.
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