Hygienic Cap Nut w/Washer Nut Overall Height 18.1 mm Minimum Temperature -20 Degrees C Maximum Temperature 100 Degrees C Nut Material Grade 316L Nut Material Finish Bright (Uncoated) Includes Seal Washer Standards EU 10/2011 FDA RoHS For Environment Hygienic Cap Type Standard Crown System of Measurement Metric Nut Material Stainless Steel Thread Size M8 Thread Depth 9.6 mm Collar Diameter 18 mm Seal Height 2.5 mm Washer Outside Diameter 19.74 mm Hex Width 13 mm