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NATIONAL 370078A  
$33.79
Price
 $0.00
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 + Sold in packs of 1x1
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 $33.79
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NATIONAL 370078A Specifications
Housing Bore (IN)6.622
Housing Bore (MM)168.200
Installation ToolRD286
MaterialNitrile
Outside Diameter (IN)6.629
Outside Diameter (MM)168.380
RedicoatYes
Shaft Diameter (IN)4.500
Shaft Diameter (MM)114.300
Type03
Width (IN)1.093
Width (MM)27.760
Nitrile, Shaft Size=4.5", Housing Bore=6.622", Outer Diameter=6.629", Width=1.093
NationalŪ Oil Seals & Bearings has built a reputation as one of the most respected names in the industry. They have offered premium sealing and wheel end solutions for more than 75 years. Their design and engineering teams keep pace with the industry and provide advanced solutions for today's vehicles.

Features & Benefits:
  • Red 37 Series oil bath seals deliver dependable point contact seal
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Unitized construction provides greater structural integrity, easier installation and main lip protection
  • Abrasion-resistant nitrile with spring-loaded main lip for positive sealing with reduced shaft interference
  • Unique rubber I.D. and O.D. includes patented SURE-LOCKŪ ribs that prevent shaft leaks and bore contamination
Additional Resources

National Heavy Duty Wheel End Offerings
National "Red" 37 Series Seal Design
National Wheel End Seal Installation Procedures
Troubleshooting Checklist For Oil Bath Seals
Seal To Bearing Comparison Sheet

NATIONAL Warranty Information:
12 Months