Global O-Ring K-Face Seal O-Ring Kit - Nitrile (Buna-N) 90 Durometer - 200 Pieces (8 Sizes) Brass Spring Check Valves Viscosity Index:169

Viscosity Index:169

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(3) 4' Extension

Global O-Ring K-Face Seal O-Ring Kit - Nitrile (Buna-N) 90 Durometer - 200 Pieces (8 Sizes) Brass Spring Check Valves Viscosity Index:169K Face Seal O Ring Kit Nitrile (Buna N) 90 Durometer 200 Pieces (8 Sizes) Nitrile (also known as Buna, Buna N, or NBR) is one of the most common sealing elastomers due to its resistance to petroleum based fuels and lubricants and its relatively low price. Nitrile elastomers are copolymers of acrylonitrile and butadiene. Performs Well In: Petroleum based oils and fuels; Aliphatic hydrocarbons; Vegetable oils; Silicone oils and greases; Ethylene glycol;