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Why Do King Pin Replacements Have Different Bolster Thicknesses

Question:

Hi, What is the significant of booster plate thickness? What happens if we order more or less thickness booster plate king pin? Kindly reply

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Expert Reply:

King pins can be found on a variety of different trailer types; 5th wheel, gooseneck, RVs, campers, lawncare, excavating, and car haulers just to name a few. So if you're just replacing the king pin you will want to use one that has a matching bolster plate thickness:

1/4" - # 337KP20025
5/16" - # 337KP20031
3/8" - # 337KP20038
1/2" - # 337KP20050

Attached is a review video for you to check out.

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Jon G

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