Flange Nut Material Grade/Class 316 H5 Material Stainless Steel Finish Plain Thread Size M8-1.25 Hex Width 13 mm Hex Height 6 11/16 mm Flange Diameter 17 29/32 mm System of Measurement Metric Dimensional Standards ISO 9001 2015 Flange Thickness 1.31 mm Hex Type Flange Nut Material Quality Standards ASTM A276 Minimum Yield Strength 30 000 psi Overall Height 8 mm Pack Size Small Pack