tapping screw 4,2x13 DIN-7981 Stainless Steel A2 Quantity: 4 423 092 pcs. tapping screw 4,8x13 DIN-7981 Stainless Steel A2 Quantity: 4 423 092 pcs. tapping screw 4,2x16 DIN-7981Stainless steel A2 Quantity: 4 423 092 pcs. tapping screw 4,8x16 DIN-7981 Stainless Steel A2 Quantity: 4 423 092 pcs. 3.1 certificate.