BUTYL BT70BK00 O-Ring, Size: -018
Material: BUTYL BT70BK00 O-Ring
Size: AS568 -018 O-Ring
Part Number: BT70BK00-OR-018
BT70BK00
Butyl (Isobutylene, IIR)
70
Shore A
General Purpose Material
Color: Black
Detailed Description
BT70BK00-OR-018 is a Black, 70 Shore A, Butyl (Isobutylene, IIR) O-Ring. BT70BK00 is manufactured with the following features & specifications: General Purpose Material. BT70BK00-OR-018 is AS568 size -018 O-Ring also referred to as 1.78mm (Cross Sectional Diameter (CS)) x 18.77mm (Inside Diameter (ID)).
Material: BUTYL BT70BK00 O-Ring
Size: AS568 -018, 1.78mm CS X 18.77mm ID (0.070" CS X 0.739" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | BT70BK00 |
| Material | Butyl (Isobutylene, IIR) |
| Color | Black |
| Durometer | 70 Shore A |
| High Temperature | 121 °C / 250 °F |
| Low Temperature | -60 °C / -76 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -018 |
| Cross Section (CS) | 1.78 mm / 0.070 in |
| Inside Diameter (ID) | 18.77 mm / 0.739 in |
Canyon BT70BK00 is a 70 durometer black Butyl (IIR) elastomer designed for O-rings and gaskets where low gas permeability and long-term sealing reliability are critical. Comparable to Parker compounds B0318-70 and B0612-70, this material provides exceptional impermeability to gases, making it ideal for both pressurized and vacuum sealing applications. It performs well in environments exposed to acids, alkalis, and ozone while maintaining flexibility and resilience across a broad service range from -76°F to 250°F (-60°C to 121°C). Its low compression set ensures lasting performance in static sealing conditions.
BT70BK00 meets ASTM D2000 M2AA706 requirements, offering a cost-effective balance of chemical resistance, thermal stability, and environmental durability. This Butyl compound is especially suitable for industrial, laboratory, and high-vacuum systems requiring strong sealing performance without the use of expensive specialty elastomers.