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Why Do King Pin Replacements Have Different Bolster Thicknesses


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


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.

expert reply by:
Jon G

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