Used for stitching metal or attaching to metal. A pre-drilled hole is required. ApprovalBS 4174:1972Corrosion Rating1 - Clean, dry & low humidity environmentsDescriptionUsed for stitching metal or attaching to metal. A pre-drilled hole is required. Driver Bit SizePZ2FinishZinc & Clear Cr3Gauge10Head TypeCountersunkLength inch1 1/4Length mm32MaterialCarbon SteelPack Dimensions L x W x H mm15 x 90 x 133Pack Weight kg0.034Point TypeAB PointProduct Code10114CCAZPRecess TypePoziSize imp.10 x 1 Size mm4.8 x 32SubstratesSteel, Thin Sheet MetalThread Dia. mm4.8Thread Type60° Self-Tapping.