Description Specifications Literature Description GO Switch Parker Seal Nut and Washer ThredSeal Kit for 70 Series GO Switches. 5/8" Zinc plated steel with nitrile rubber (standard). State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Product Specifications Product SpecificationsMaterial:VitonDimensions:5/8" Literature & Docs Product Details Accessories