Made of low carbon steelIdeal nuts applied to paperboard, cardboard, and thin plastics or sheet metalZinc plated to improve corrosion resistanceSwordfish 30550-Metric & SAE Blind Jack Nut Assortment, 180 piecesSKU: 30550$46.89PriceQuantity*Add to CartBuy NowDESCRIPTION:Swordfish 30550 - Metric and SAE Blind Jack Nut Rivet Nut Assortment, Size from #6 to 1/4" and M4 to M6, Total 10 Sizes, Package of 180 Pieces