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More Information for NATIONAL 370178A
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NATIONAL 370178A  
$23.79
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 $0.00
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 + Sold in packs of 1x1
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 $23.79
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[Wholesaler Closeout -- 30 Day Warranty] (Only 3 Remaining)
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NATIONAL 370178A Specifications
Housing Bore (IN)5.500
Housing Bore (MM)139.700
Installation ToolRD311
MaterialNitrile
Outside Diameter (IN)5.515
Outside Diameter (MM)140.080
Shaft Diameter (IN)4.500
Shaft Diameter (MM)114.300
Type07
Width (IN)0.675
Width (MM)17.150
Nitrile, Shaft Size=4.5", Housing Bore=5.5", Outer Diameter=5.515", Width=0.675
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
OEM / Interchange Numbers: 15527781, 2122717, 8004633, 8004670, 8004855, 837512

Closeout Inventory Warranty Information:
Wholesaler Closeout items have a 30 day warranty (but still are covered by our Return Policy).

NATIONAL Regular Inventory Warranty Information:
12 Months