2K8257 CATERPILLAR 2K-8257: SEAL

Primary Sealing Material: Rubber
Seal/O-Ring Type: Standard
Dash Size (in): 257
Cross Section Diameter (in): 0.139
Inside Diameter (in): 5.859
Outside Diameter (in): 6.137
Material: NBR - Nitrile
Material Description: Nitrile (NBR) rubber is capable of service temperatures of -40 to 100C and is resistant to fuel oils, gasoline, ultra low sulfur diesel fuel and lubricants. Nitrile rubber is not recommended for applications that require resistance to bio-diesel or coolant.
Hardness (Shore A): 75
SAE AS568 Dash Size: -257
Coating: None
Color: Black
Color Notes: Actual o-ring color may differ from image.
Notes: Dimensions and material descriptions provided for reference only.