Washer, Cr, Black, 16.8Mm Od, 11.7Mm Id; Internal Diameter:11.7Mm; External Diameter:16.8Mm; Fastener Material:Cr (Chloroprene Rubber); Thread Size - Metric:-; Fastener Plating:-; Product Range:Guardxcel Series Rohs Compliant: Na |Amphenol Industrial AIO-BFCSSW-0SC