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NATIONAL 370003A  
$13.33
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NATIONAL 370003A Specifications
Housing Bore (IN)6.311
Housing Bore (MM)160.300
Installation ToolRD305
MaterialNitrile
Outside Diameter (IN)6.325
Outside Diameter (MM)160.480
Shaft Diameter (IN)4.765
Shaft Diameter (MM)121.030
Type11
Width (IN)1.078
Width (MM)27.380
Nitrile
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:
  • Dynamic Edge 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 "Red" 37 Series w/ Dynamic Edge Technology Seal Design
National Heavy Duty Wheel End Offerings
National Wheel End Seal Installation Procedures
Troubleshooting Checklist For Oil Bath Seals
Seal To Bearing Comparison Sheet
OEM / Interchange Numbers: 027003943, 027021377, 027074450, 027074962, 027104674, 027108900, 027128839, 1045273, 1096254950, 114228, 114229, 11CH0210, 15550869, 15557677, 15679880, 15982769, 15982869, 1870613500, 2057480, 2317614, 2322621, 2332303, 27003943, 27021377, 27074450, 27074962, 27104674, 27108900, 27128839, 2955840, 2975361, 32QJ00127A, 32QJ127A, 32QJ179, 32QJ19325, 32QJ19336, 32QJ19353, 32QJ19354, 32QJ19355, 32QJ19373, 32QJ237, 4C4O1177BA, 4C4O1177DA, 4C4Z1177BB, 4C4Z1177DB, 510515, 544694, 56208F, 620199, 685215, 704925, 8006852150, 8060888, 8159828690, 837003, 88AX287, 88AX420, 940010019, 940010022, 940010028, 940010030, 940010034, 97715620, A1205J1726, A1205V2492, A29056, D3HZ1175A, D5HZ1175A, D7HA1175A1A, D7HZ1175A, D7HZ1175D, E1HT1175AA, E1HT1175BA, E1HZ1175A, E1HZ1175B, E2HZ1177A, E4HT1175AA, E4HZ1175B, E5HT1175GA, E6HS1175AA, F2HZ1175C, F2HZ1S175C, F4HS1175BA, V8020698

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