O-Ring, 0.21 in C/S x 3.1 in ID 5.33 mm C/S x 78.74 mm ID, Buna N 75, Peroxide Cured / Black Series # -338

• Durable buna n construction
• Direct replacement for OE part 9F4446
• Multiple Engine Applications
• Genuine PAI product including a factory 2-Year Warranty
• Quality You Can Trust - PAI has established themselves as the leading supplier of aftermarket heavy duty diesel parts, with quality standards that always meet or exceed OE standards

Features

• DETAIL - PAI O-rings are carefully designed and feature unparalleled low tolerances. O-ring specifications are measured in a 3D environment and tested to ensure the 100% functionality.
• STRENGTH - PAI O-rings are made of industry leading materials and processes. Hardness ratings will vary between O-rings, but all PAI O-rings are tested to ensure product integrity, fitment, and longevity.
• VARIETY - PAI is a market leader of heavy-duty diesel truck parts, and our O-rings are no exception. Our O-rings come in various materials including but not limited to Viton (Fluorocarbon), PTFE, Nitrile, Neoprene, and EPDM Rubber.

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Cross References:
Caterpillar: 785409, Caterpillar: 3L3319, Caterpillar: 6H1217, Caterpillar: 78-5409, Caterpillar: 7J6915, Caterpillar: 8T7197, Caterpillar: 9F4446