Countersink Gauges
For a flush fit every time, these gauges ensure your fastener and countersink mate perfectly for a secure hold. These gauges are often used to verify the top diameter and angle of holes in precision assemblies. They’re preferred over chamfer gauges, which also measure diameter but don’t check countersink angle. When the conical probe touches the hole’s angled walls, the diameter will display on the dial.
To verify the countersink angle, feel how snug the probe fits into the hole. You’ll also know the angle is incorrect when the reading for the top diameter is a different value than expected. Choose a gauge with an angle that matches that of your hole.
For technical drawings and 3-D models, click on a part number.
Dial | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Measuring Range | Accuracy | Measuring Increments | Probe Type | Material | Industry Designation | Dia. | Face Color | Contact Point Material | Each | |
100° Angle Measured | ||||||||||
| 0.02"-0.17" | ±0.0005" | 0.002" | Cone | Powder-Coated Aluminum | AGD Group 1 | 1 5/8" | White | Steel | 0000000 | 0000000 |
| 0.16"-0.36" | ±0.0005" | 0.002" | Cone | Powder-Coated Aluminum | AGD Group 1 | 1 5/8" | White | Steel | 0000000 | 000000 |
| 0.36"-0.56" | ±0.0005" | 0.002" | Cone | Powder-Coated Aluminum | AGD Group 1 | 1 5/8" | White | Steel | 0000000 | 000000 |
| 0.56"-0.78" | ±0.0005" | 0.002" | Cone | Powder-Coated Aluminum | AGD Group 1 | 1 5/8" | White | Steel | 0000000 | 000000 |
Starrett Countersink Gauges
Mate your fastener and countersink perfectly for a secure hold with these Starrett gauges. They are often used in vehicle and metal manufacturing to check the top diameter and countersink angle of a hole. When the conical probe touches the hole’s angled walls, the diameter will display on the dial. You can verify the countersink angle based on how snug the probe fits into the hole. Even when you lift the gauge out of the hole, your measurement will stay on the dial until you press the reset button.
Choose a gauge with an angle that’s equal to the angle of the countersunk hole you’re trying to measure.
For technical drawings and 3-D models, click on a part number.
Dial | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Measuring Range | Accuracy | Measuring Increments | Probe Type | Material | Industry Designation | Dia. | Face Color | Contact Point Material | Manufacturer Model Number | Each | |
100° Angle Measured | |||||||||||
| 0.02"-0.17" | ±0.0002" | 0.002" | Cone | Steel | AGD Group 1 | 1 5/8" | White | Steel | 689-1Z | 000000000 | 0000000 |
| 0.16"-0.36" | ±0.0002" | 0.002" | Cone | Steel | AGD Group 1 | 1 5/8" | White | Steel | 689-2Z | 000000000 | 000000 |
| 0.36"-0.56" | ±0.0002" | 0.002" | Cone | Steel | AGD Group 1 | 1 5/8" | White | Steel | 689-3Z | 000000000 | 000000 |
| 0.56"-0.78" | ±0.0002" | 0.002" | Cone | Steel | AGD Group 1 | 1 5/8" | White | Steel | 689-4Z | 000000000 | 00000000 |