Taps with Two Threading Ends
With a taper chamfer and bottoming chamfer at opposite ends, these taps start threads easily and are good for threading close to the bottom of closed-end holes. The taper chamfer has 7-10 chamfered cutting threads to drive into the workpiece and start threads with less torque than other chamfer types. The bottoming chamfer has 1-2 chamfered cutting threads to create full threads near the bottom of closed-end holes. To tap threads, turn the tap with an open-end wrench or drive it at either end using an L-key or ratchet wrench. All are made of high-speed steel and are for use on most metal and plastic.
For technical drawings and 3-D models, click on a part number.
Thread | Drill Bit | Taper and Bottoming Chamfers | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | For Wrench Size, mm | For Hex Drive Size, mm | Each | |
Uncoated High-Speed Steel | ||||||||||
| M12 | 1.25 | 55/64" | 2 3/4" | 27/64" | 0.4232" | 4 | 8 | 4 | 0000000 | 000000 |
| M12 | 1.5 | 55/64" | 2 3/4" | 13/32" | 0.4134" | 4 | 8 | 4 | 0000000 | 00000 |
| M12 | 1.75 | 55/64" | 2 3/4" | 13/32" | 0.4035" | 4 | 8 | 4 | 0000000 | 00000 |
| M14 | 1.5 | 55/64" | 2 3/4" | 31/64" | 0.4921" | 4 | 10 | 4 | 0000000 | 00000 |
| M14 | 2 | 55/64" | 2 3/4" | 15/32" | 0.4724" | 4 | 10 | 4 | 0000000 | 00000 |
| M16 | 1.5 | 55/64" | 2 3/4" | 37/64" | 0.5709" | 4 | 12 | 4 | 0000000 | 00000 |
| M16 | 2 | 55/64" | 2 3/4" | 35/64" | 0.5512" | 4 | 10 | 4 | 0000000 | 00000 |
| M20 | 1.5 | 15/16" | 3 9/64" | 47/64" | 0.7283" | 4 | 15 | 6 | 0000000 | 000000 |
| M20 | 2.5 | 15/16" | 3 9/64" | 11/16" | 0.689" | 4 | 13 | 6 | 0000000 | 00000 |
| M24 | 1.5 | 1 1/16" | 3 35/64" | 57/64" | 0.8957" | 4 | 19 | 8 | 0000000 | 000000 |
| M24 | 3 | 1 1/16" | 3 35/64" | 53/64" | 0.8268" | 4 | 15 | 8 | 0000000 | 000000 |
Pipe and Conduit Thread Taps with Two Threading Ends
With a taper chamfer on one threading end and a bottoming chamfer on the other, these pipe and conduit taps start threads easily and are good for threading close to the bottom of closed-end holes. The taper chamfer has 7-10 chamfered cutting threads to drive into the workpiece and start threads with less torque than other chamfer types. The bottoming chamfer has 1-2 chamfered cutting threads to create full threads near the bottom of closed-end holes. To tap threads, turn the tap with an open-end wrench or drive it at either end using an L-key or ratchet wrench. All are made of high-speed steel and are for use on most metal and plastic.
Drill Bit | Taper and Bottoming Chamfers | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Type | Threads Per Inch | Thread Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | For Wrench Size, mm | For Hex Drive Size, mm | Each | |
Uncoated High-Speed Steel | |||||||||||
| 1/4 | BSPP | 19 | 55/64" | 2 3/4" | 11.8 mm | 0.4645" | 4 | 8 | 4 | 0000000 | 000000 |
| 3/8 | BSPP | 19 | 55/64" | 2 3/4" | 15.3 mm | 0.6024" | 4 | 12 | 4 | 0000000 | 00000 |
| 1/2 | BSPP | 14 | 15/16" | 3 9/64" | 19 mm | 0.748" | 4 | 15 | 6 | 0000000 | 000000 |
| 3/4 | BSPP | 14 | 1 1/16" | 3 35/64" | 24.5 mm | 0.9646" | 4 | 19 | 8 | 0000000 | 000000 |
| 1 | BSPP | 11 | 1 9/64" | 3 15/16" | 30.5 mm | 1.2008" | 4 | 24 | 10 | 0000000 | 000000 |
Spark Plug Thread Repair Tools
Attach these tools to a socket wrench to restore rusted and damaged spark plug threads in two common sizes.
Thread | |||||||
|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Lg. | Overall Lg. | Material | No. of Flutes | Each | |
| M14 × M18 | 1.25 × 1.5 | 5/8" × 5/8" | 2 9/16" | Black-Oxide Steel | 3 | 0000000 | 000000 |