SEALING GUIDE
LIGHT TRAILER BEARING AND SEALING GUIDE
National Seal
Axle
Seal Alt#
Axle MFG
Seal Size Seal#
OB Seal# Brake Size
Studs Capacity
442109 412920 370219A 12-1/4" x 2-1/2" DEX 8 442109 412920 370219A 12-1/4" x 3-3/8" DEX 8
7.2k
2.25" x 3.376"
8k 8k 7k
12" X 3-3/8" ALKO 8
2.125" x 3.376" 440972 413470
12" x 2"
DEX 8 ALKO 8 ALKO 8 TB 8
2.25" x 3.376" 442109 412920 370219A 12" x 2"
2.125" x 3.376" 440972 413470
12" x 2"
2.125" x 3.376" 2.125" x 3.376"
413470
5.2k
440972 413470
12" x 2"
DEX 5 or 6 6k
2.25" x 3.376" 442109 412920 370219A 12" x 2"
ALKO 6 ALKO 6 DEX 6 Hayes 6 Hayes 6 Fayette 4 TB 6 ALKO 8
2.125" x 3.376" 440972 413470 2.125" x 3.376" 440972 413470
12" x 2" 12" x 2"
5.2k
2.25" x 3.376" 442109 412920 370219A 12" x 2" 2.25" x 3.376" 442109 412920 370219A 12" x 2"
1.718" x 2.565" 442251 473336
12" x 2"
2.125" x 3.256"
473243
5.2k
12" x 2"
1.50" x 1.987" 443018 474276
7" x 1-1/4"
DEX 4 or 5 2k
1.375" x 1.987" 1.687" x 2.328"
482163 473317
TB TB
1.5-2.5K 2.9-3.75k
1.718" x 2.565" 442251 473336 1.718" x 2.565" 442251 473336 1.718" x 2.565" 442251 473336 1.718" x 2.565" 442251 473336
10" x 2-1/4"
DEX 4/5/6 3.5k
10" x 2-1/4" Hayes 6 10" x 2-1/4" Fayette 4 10" x 2-1/4" ALKO 5 or 6
1.75" x 2.328"
482126
10" x 1-1/2"
DEX 4 or 5 2.8k
1.718" x 2.565" 442251 473336
10" x 1-5/8" Hayes 5
417172 3710014A
DEX
10,12,15k
2.375" x 3.376"
470350
370450A National Trailer Bearing Kits
1.125" x 1.78" 204020 1.218" x 1.983" 203025 1.25" x 1.972" 203012 1.50" x 2.332" 203013 1.75" x 2.566" 105015
FM001 Kit FM002 Kit FM003 Kit FM004 Kit FM005 Kit
• TB = Trailer Buddy
19
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