What is MIL-PRF-7870?

What is MIL-PRF-7870?

MIL-PRF-7870 is a U.S. military performance specification for general-purpose, low-temperature lubricants, identified by the NATO code O-142. This standard defines a single lubricant grade, ensuring reliable performance and protection in extreme cold environments.

Key Features of the MIL-PRF-7870 Standard

Single oil grade for simplicity

The specification covers only one grade of oil, specifically formulated to deliver effective performance at very low temperatures—making it suitable for applications that do not require complex classifications.

Reliable performance in cold climates

Lubricants qualified under this standard must maintain lubricity, corrosion resistance, and chemical stability across a broad temperature range from –54 °C to +122 °C, meeting the demanding requirements of military aviation operations.

Top Products Meeting MIL-PRF-7870 Standards

TOP	Product Name	Product photo	Product Description
1	Krytox GPL 107		Krytox GPL 107 is a clear, fluorinated perfluoropolyether (PFPE) synthetic oil for long-term lubrication. Krytox GPL107 is completely non-flammable and non-reactive, making it ideal for extreme temperature applications.
2	Krytox GPL 205		Krytox GPL 205 is a white, synthetic grease made from perfluoropolyether (PFPE) and PTFE thickener, with many outstanding properties.
3	Krytox GPL 227		Krytox GPL 227 is a white PFPE grease that provides improved corrosion, rust and wear protection.

Applications of the MIL-PRF-7870 Standard

Lubrication of aviation systems in extreme cold

MIL-PRF-7870 oils are widely used to lubricate mechanical parts such as hinges, shafts, and joints in aircraft operating in polar regions or very low temperatures.

Reliable operation in harsh environments

With anti-rust, anti-oxidation, and low volatility properties, these lubricants protect equipment exposed to fluctuating temperatures, helping extend the service life of components.

Simplified logistics and safer use

By standardizing to a single oil type, aviation units reduce the risk of product mix-ups, simplify maintenance, and ensure compatibility with various materials and seals.