Hygienic Hex Nut Nut Overall Height 26 mm Nut Material Grade 316L Standards EHEDG Certified FDA Compliant RoHS For Environment Hygienic System of Measurement Metric Nut Material Stainless Steel Thread Size M16 Thread Depth 17 mm Collar Diameter 32 mm Washer Outside Diameter 32.8 mm Hex Width 24 mm Seal Material EPDM Seal Material - Maximum Temperature 120 Degrees C Seal Material - Minimum Temperature -40 Degrees C Average Surface Roughness (Ra) less than 0.8 micron