M3-M12 Nutsert Mandrels Nut Rivet Tool Kit Rivnut Riveting Riveter Gun Thread UK. The Nut Riveter Set includes seven different sized mandrels including M3, M4, M5, M6, M8, M10& M12, mandrel spanner for attaching sized mandrel to riveter and x 100 Zinc Coated Steel Rivet Nut Inserts, all housed within a blow mould case.
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