Image shown is representative and may differ from the actual product in size, proportions, and color shade
0.315 in
(8.00 mm)
16.732 in
(425.00 mm)
BUTYL Parker B0612-70 O-Ring, Size: 8X425
Material: BUTYL Parker B0612-70 O-Ring
Size: Metric 8X425 O-Ring
Part Number: B0612-70-OR-8X425
Parker Seal® (Parker)
B0612-70
Butyl (Isobutylene, IIR)
70
Shore A
Low Compression Set
Color: Black
Detailed Description
B0612-70-OR-8X425 is a Black, 70 Shore A, Butyl (Isobutylene, IIR) O-Ring made from Parker Seal® (Parker). It is a 70 durometer Butyl (Isobutylene, IIR). Parker Seal® (Parker) B0612-70 is manufactured with the following features & specifications: Low Compression Set, General Purpose Material. B0612-70-OR-8X425 is Metric size 8X425 O-Ring also referred to as 8mm (Cross Sectional Diameter (CS)) x 425mm (Inside Diameter (ID)). Material: 70 Durometer BUTYL Parker B0612-70 O-Ring Size: Metric 8X425, 8mm CS X 425mm ID (0.315" CS X 16.732" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | B0612-70 |
| Brand | Parker Seal® (Parker) |
| Material | Butyl (Isobutylene, IIR) |
| Color | Black |
| Durometer | 70 Shore A Hardness |
| High Temperature | 121 °C / 250 °F |
| Low Temperature | -59 °C / -74 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | Metric |
| Size | 8X425 |
| Cross Section (CS) | 8.00 mm / 0.315 in |
| Inside Diameter (ID) | 425.00 mm / 16.732 in |
Parker’s B0612-70 is a 70 Shore A black Butyl (IIR) compound engineered for sealing applications that demand excellent low-temperature flexibility, low permeability, and resistance to polar fluids. With a service temperature range of -75°F to 250°F, it performs reliably in hot water and steam environments while maintaining elasticity at very low temperatures. This compound is well suited for salt solutions, glycol-based brake fluids (DOT 3 and DOT 4), poly-glycol hydraulic fluids (HFC), phosphate-ester fluids (HFD-R), and a wide range of polar solvents including alcohols, ketones, and esters. Its strong resistance to ozone, aging, and weathering supports long service life in both static and vacuum sealing applications.
B0612-70 meets ASTM D2000 M4AA708 requirements and is commonly selected where gas impermeability, environmental resistance, and brake fluid compatibility are critical. It is not recommended for use with mineral oils, greases, fuels, or chlorinated hydrocarbons. Canyon Components offers equivalent Butyl (IIR) materials that match or exceed the performance of Parker B0612-70 for steam, brake fluid, and low-temperature sealing applications.
Common relevant keywords:
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