Product Description
Replacement Trailer Hub Stud for 10K 12K Trailer Axles
Quantity Options Available
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Set of 4
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Set of 8
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Bag of 100
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Case of 300
Product Details – ⅝”-18 Trailer Hub Stud
You can purchase this trailer hub stud by itself, with swivel flange nuts, or choose the option to add a standard 5/8-18 cone lug nut with each wheel stud for a complete setup.
This 5/8” trailer wheel stud is commonly used on 10,000 lb and 12,000 lb trailer axle hubs with 5/8 studs. making it one of the most universal and widely used studs across many axle brands. While it fits a large range of applications, always verify your measurements before ordering to ensure proper fitment.
Important Fitment Note:
The knurl diameter is the most critical measurement. This is the portion of the stud that presses into the trailer hub:
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If the knurl diameter is too small, the stud may not seat properly and can fall out.
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If the knurl diameter is too large, installation will be difficult and may damage the hub.
Stud Specifications
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Thread Size: ⅝”-18
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Overall Length: 3.70”
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Knurl Diameter: 0.68”
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Head Diameter: 0.92
Some Identifying marks: 21B25
Interchangeable part numbers but not limited to: 21B25, 115-01, 21D23
