PAI part description

Features & Benefits

  • Durable Buna N construction
  • Direct replacement for OE part 3957131
  • 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

Product Attributes

Material Buna N
Inside Diameter 0.364 IN
Inside Diameter 9.25 MM
As568 Standard Size Dash Number -12
Color/Finish Peroxide Cured
Cross Section 0.07 IN
Cross Section 1.78 MM
Durometer 75
Notes O-Ring 0.07 in C/S x 0.364 in ID 1.78 mm C/S x 9.25 mm ID Buna N 75, Peroxide Cured Series # -012

Part Interchanges

Backed by 40 years of part manufacturing experience, PAI Industries® has been providing the heavy-duty truck industry with high-quality service parts for the engine, gearing, exhaust, suspension, and electrical systems. This brand has been manufacturing its products in the USA since 1973, and it owes its worldwide success to its dedicated and experienced employees. PAI takes pride in being an ISO 9001:2015-certified auto and truck parts manufacturer, operating in a 54,000 square feet facility that is equipped with state-of-the-art machinery. PAI’s technicians also perform 100% testing and inspection in its oil pump, water pumps, gear, synchronizer, and cylinder head to ensure durability and reliable performance.

PAI 121331 Cross Reference

We have 5 alternatives for the 121331 by PAI:

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