National 7781S Oil Seal 640206815482 later models of the B-52

later models of the B-52 continue to serve the United States Air Force

Berard has been synonymous with quality

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National 7781S Oil Seal 640206815482 later models of the B-52Brand National Oil Seals Model 7781S National oil seals are recognized worldwide for their quality and reliable performance for every type of repair. Design Type: Springless; Single Lip Provides good low temperature capability Low swell in hydrocarbon fluids Temperature Range: 40F to 225F; 40C to 107C National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 70 years.