Mount Type Mount Type |
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For Maximum Trailer Weight For Maximum Trailer Weight |
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System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Vertical Capacity Vertical Capacity |
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Stud Length Stud Length |
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Ring ID Ring ID |
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Material Material |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Thread Length Thread Length |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Ring Thickness Ring Thickness |
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Overall Depth Overall Depth |
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Certification Certification |
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Class Class |
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Finish Finish |
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Thread Type Thread Type |
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Hardness Hardness |
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Threaded Plug Gauges with Calibration Certificate

These gauges come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They allow you to inspect internal threads on parts. All have a go gauge on one end and a no-go gauge on the other end. A taperlock handle lets you quickly replace worn gauges.
Check the minimum internal thread size with the go gauge end, and check the maximum internal thread size with the no-go gauge end. A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.
Threads have different classes of fit. Thread fit designates the tightness or looseness of mating threads. For example, inch threads with a 3B fit have tighter tolerances than threads with a 2B fit.
For technical drawings and 3-D models, click on a part number.
Drawbar Rings

These rings mount to a trailer and connect to the drawbar coupler or tow hook on a vehicle to create a towing connection. Maximum trailer weight is the total weight being towed. Vertical capacity (also known as tongue weight) represents the weight of the load on the drawbar ring.
Note: Capacity is reduced 25% in off-road use.
For technical drawings and 3-D models, click on a part number.
Overall | Ring | Thread | |||||||||
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Style | For Max. Trailer Wt., lbs. | Vertical Capacity, lbs. | Dp. | Material | ID | Thick. | Stud Length | Size | Length | Each | |
Threaded Stud | |||||||||||
3 | 15,000 | 3,000 | 9 1/8" | Steel | 2 1/2" | 1 1/2" | 3 1/4" | 1 1/2"-6 | 1 3/4" | 00000000 | 0000000 |