Skip to main content

Castrol Aero 40 Hydraulic Fluid

Silmid P/N: VAR0000601
From £25.05 (excl VAT) £30.06 (Inc VAT)

Castrol Aero 40 is a high quality, mineral based MIL-H-5606 hydraulic fluid.

Product Properties

Castrol Aero™

Product Information

Castrol Aero 40 is designed for use in landing gear shock struts. Castrol Aero 40 is compatible with approved MIL-PRF-6083 and other MIL-PRF-5606 qualified hydraulic fluids. It is not completely compatible with synthetic gas turbine lubricants nor with phosphate-ester hydraulic fluids

. It is compatible with other petroleum-based and synthesised hydrocarbon lubricants but contamination should be avoided in order to maintain the unique properties of Castrol Aero 40. It is compatible with seals, hoses and paints normally used in shock struts and dispensing equipment connected with this application.

While certain grades of the above materials are fully compatible with Castrol Aero 40, it is advisable to confirm acceptability of use with either the material manufacturer or Castrol.


  • Approved EP additive
  • Reduces martensitic streaking of landing gear outer cylinders and galling of shock strut upper bearings.

Shipping information

Orders over £100 placed online will now qualify for FREE UK Mainland delivery*

Orders under £100 placed online for UK Mainland delivery is £12.00*

**Orders requiring Pre 10.00am Next Day delivery has also been lowered from £35.00 to £30.00, orders placed through the office will incur additional charges.** 

International delivery (door to door delivery) is available for selected countries worldwide. Shipping will be automatically calculated based on the weight, location and hazardous nature of the goods. Customers can also choose ex works to arrange their own collection.

Please refer to our delivery page for more information.