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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |