Image shown is representative and may differ from the actual product in size, proportions, and color shade
0.157 in
(4.00 mm)
3.031 in
(77.00 mm)
NEO Parker C0557-70 X-Ring, Size: 4X77
Material: NEO Parker C0557-70 X-Ring
Size: Metric 4X77 X-Ring
Part Number: C0557-70-XR-4X77
Color: Black
Detailed Description
C0557-70-XR-4X77 is a Black, 70 Shore A, Neoprene® (Chloroprene) X-Ring made from Parker Seal® (Parker). It is a 70 durometer Neoprene® (Chloroprene). Parker Seal® (Parker) C0557-70 is manufactured with the following features & specifications: Drive Belt, General Purpose Material. C0557-70-XR-4X77 is Metric size 4X77 X-Ring also referred to as 4mm (Cross Sectional Diameter (CS)) x 77mm (Inside Diameter (ID)). Material: 70 Durometer NEO Parker C0557-70 X-Ring Size: Metric 4X77, 4mm CS X 77mm ID (0.157" CS X 3.031" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | C0557-70 |
| Brand | Parker Seal® (Parker) |
| Material | Neoprene® (Chloroprene) |
| Color | Black |
| Durometer | 70 Shore A Hardness |
| High Temperature | 121 °C / 250 °F |
| Low Temperature | -37 °C / -35 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | X-Ring |
| Size Standard | Metric |
| Size | 4X77 |
| Cross Section (CS) | 4.00 mm / 0.157 in |
| Inside Diameter (ID) | 77.00 mm / 3.031 in |
| Other Specifications | |
Drive Belt | |
Parker’s C0557-70 is a 70 Shore A black Neoprene (Chloroprene, CR) compound developed for general-purpose sealing applications requiring a balance of oil resistance, environmental durability, and mechanical stability. With a service temperature range of -35°F to 250°F, it performs reliably in contact with paraffin-based mineral oils, silicone oils and greases, water and water-based fluids at lower temperatures, refrigerants, ammonia, and carbon dioxide. Compared to nitrile, this compound provides improved resistance to ozone, weathering, and aging, supporting longer service life in outdoor and industrial environments. Its medium durometer offers a practical combination of flexibility and extrusion resistance for both static and moderate dynamic sealing conditions.
C0557-70 meets ASTM D2000 M3BC710 requirements and is commonly used in industrial, refrigeration, and general equipment sealing applications. It has limited compatibility with naphthenic mineral oils such as IRM 902 and IRM 903 and with glycol-based brake fluids. This compound is not recommended for aromatic hydrocarbons, chlorinated hydrocarbons, or polar solvents such as ketones, esters, and ethers. Canyon Components offers equivalent chloroprene materials that match or exceed the performance of Parker C0557-70 for oil, refrigerant, and environmentally exposed sealing applications.
Common relevant keywords:
Neoprene, Chloroprene Rubber, CR Elastomer, 70 Shore A Neoprene, General Purpose Neoprene, Neoprene O-rings, Neoprene Gaskets, Refrigerant Seals, Ozone Resistant Rubber, Weather Resistant Elastomers, Aging Resistant Neoprene, Industrial Neoprene Seals, Parker Neoprene Equivalent, Datasheet, TDS, Test Report, MTR, MSDS, SDS, Parker C557-70, Parker C557, C557-70 O-rings, C0557-70 gaskets, Parker C55770, C557-70 Neoprene seals
