Is the Inch O-ring set, NBR suitable for general use and compatible with oils and hydraulic fluids?

Yes. The Inch o-ring set, NBR is suitable for general use and is compatible with many oils and hydraulic fluids. NBR (nitrile rubber) with a hardness of 70 Shore is a common choice for seals exposed to petroleum-based oils, fuels, and hydraulic fluids, offering good resistance to abrasion, tearing, and compression set. It performs well in typical temperature ranges for general industrial and automotive applications, though extremely high temperatures, certain aggressive chemicals (like ketones, strong acids or aromatic hydrocarbons), and prolonged exposure to very high-pressure or high-temperature hydraulic fluids may reduce its service life. For specific compatibility, verify the particular oil or hydraulic fluid type and operating temperature/pressure against NBR resistance charts and confirm sizes/quantities with the photo-provided detailed information.

Does the Inch O-ring set, NBR include metric size equivalents or only inch sizes?

Inch o-ring set, NBR includes only inch sizes. The product description specifies an "O-ring seal set, inch" and notes detailed quantities and sizes are shown in the photo, which implies the listed dimensions are in inches (imperial). There is no mention of metric equivalents in the description, so you should assume metric sizes are not included unless the sellerâs photo or additional product info explicitly lists metric dimensions. If you need metric equivalents, contact the seller for confirmation or a metric-conversion list.

Can the Inch O-ring set, NBR withstand temperatures below -20Â°C for outdoor applications?

Inch o-ring set, NBR Format: NBR (nitrile rubber) with 70 Shore A hardness is commonly used for general-purpose O-rings and performs well in many oil- and fuel-resistant applications. Standard NBR compounds typically have an effective temperature range of about -30Â°C to +100Â°C, but performance near the lower limit depends on specific formulation and service conditions. For outdoor applications below -20Â°C consider: - Flexibility and sealing: At temperatures around -20Â°C to -30Â°C NBR becomes stiffer and less elastic, which can reduce sealing ability and increase the risk of leakage or extrusion under dynamic or low-compression conditions. - Brittleness risk: Prolonged exposure to repeated low-temperature cycling can increase the risk of cracking or loss of resiliency. - Static vs dynamic: Static seals (non-moving parts) tolerate low temperatures better than dynamic seals (shafts, pistons), where friction and wear increase. - Environmental exposure: UV, ozone, and weathering outdoors further degrade NBR over time; additives and specific grades can improve resistance but are not specified here. - Safety margin: Because the product description lists only âNBR, hardness 70 Shoreâ without a certified low-temperature grade, rely on conservatively assuming marginal performance below -20Â°C. Recommendation: If your application will see temperatures below -20Â°C regularly or involves dynamic sealing, choose a low-temperature-specified elastomer (e.g., FKM with low-temp formulation, HNBR rated for low temps, or silicone/fluorosilicone for extreme cold) or obtain technical data sheet/low-temperature test results from the supplier for the exact NBR compound before use. If occasional short exposures occur and the seal is static and not critical, Inch o-ring set, NBR Format may function but with reduced reliability.