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Fuel Drain Valve o-rings A set of 2 High Quality Fluorosilicone MilSpec M25988/2 (FVMQ) O-rings for the Fuel in Water drain valve and 1 Viton O-ring for the valve stem. For the drain valves on both the 1994.5-1997 trucks and vans along with the 1999-2003 trucks and vans.

All of our O-rings are Made in the USA for the original OEM Fuel Bowl and drain valve!

Temp range: -70º F to +437º F used in military aircraft fuel (JP-4, JP-5, JP-8), aerospace and lubrication applications.

Blue Fluorosilicone: The Blue Fluorosilicone elastomer is a Military Specification material that has a much wider temperature range than Viton (A) or Viton (B) and is widely used where fuel contains corrosive agents that are found in ULSD. Bio and veggie fuels. They will stay flexible in arctic conditions down to -70º F and can withstand temperatures in excess of 400 F.

From Parker Hannifin :
"In the automotive market, fluorosilicones are the seal material of choice for handling gasoline, E85, diesel fuel, biodiesel and ULSD at extremely low temperatures."


Order of 1 is a set of 3 o-rings. The third o-ring is a Viton for the stem of the valve which keeps moisture and contamination from getting into the interior of the valve. For all 94-03 F-series trucks.

Instruction Sheet: Download PDF file Here.

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Item #12-001

obs drain valve
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