Product description Metric Low-Strength Steel Cap Nuts Often referred to as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. About half the strength of medium-strength steel cap nuts, use them in light duty fastening applications, such as securing access panels. Zinc-plated steel cap nuts resist corrosion in wet environments. Chrome-plated steel cap nuts have excellent resistance to chemicals and salt water and have a decorative metallic finish. Product detail Drive styleExternal hex Nut typeCap,hex Thread TypeMetric Thread DirectionRight Hand Thread spacingCoarse Thread FitClass 6H Grade/ClassGrade 4 MaterialMild carbon steel FinishBlue White Zinc StandardDIN1587 Product drawing Quality control process Production workshop Packing and shipping Customized Cap Nuts website:http://www.xgfhardware.com/nuts/cap-nuts/