Specification Sheet Part Number: 166-90446 Polyester elastomer washer provides ingress protection against moisture and is oil resistant. Smallpip in bore retain washer onto metric threaded fittings. Ribs on both sides of washer enhances sealing performance. HelaGuard Accessories, Sealing Washer, M16-3/8 , Polyester Elastomer, Blue, 10/pkg Article Number 166-90446 Type RSW038 Color Blue (BU) Quantity Per pack Product Description Face sealing washer affixed between metric threaded fitting and entry wall surface to achieve IP66, IP67, IP68 and IP69 levels of ingress protection. Hardness 33 Shore D. Self-extinguishing and halogen free. Short Description HelaGuard Accessories, Sealing Washer, M16-3/8 , Polyester Elastomer, Blue, 10/pkg Global Part Name RSW038-TPE-BUTechnical Description Manufacturer Reference Number: RSW16-BU Variant Seal Washer Thickness T (Imperial) 0.06 Thickness T (Metric) 1.6 Inner Diameter D (Imperial) 0.63 Inner Diameter D (Metric) 16.0 Outside Diameter OD (Imperial) 0.94 Outside Diameter OD (Metric) 24.0 Nominal Diameter (Imperial) 0.38 Nominal Diameter (Metric) 16.0 Material Thermoplastic Elastomer (TPE) Material Shortcut TPE Operating Temperature -58F to +275F (-50C to +135C)