General Purpose Taps
Cut threads into most metal and plastic. These high-speed steel taps are durable enough for small-scale tapping jobs, but they're not recommended for production use. For better chip flow, choose a tap with fewer flutes.
Drive square-shank taps with a tap wrench or use them in a tap holder for drill presses and milling machines. Uncoated taps are strong enough for most tapping jobs but have the shortest tool life. Taper-chamfer taps have 7-10 chamfered threads at the tip for cutting into the workpiece. They require less torque than other chamfer types, making them a good choice for starting threads and tapping through holes. However, a longer taper means that they cannot thread as close to the bottom of closed-end holes.
Plug-chamfer taps are a versatile choice for most tapping applications. With 3-5 chamfered cutting threads, they require moderate torque and are often used for start-to-finish tapping of through holes and closed-end holes. However, they do not start threads as easily as taper chamfers. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.
Bottoming-chamfer taps cut into the workpiece with just 1-2 chamfered threads. This short chamfer lets them thread holes closer to the bottom than other taps, but they require more torque to start threads.
Sets include one taper-, one plug-, and one bottoming-chamfer tap.
For technical drawings and 3-D models, click on a part number.
Thread | Drill Bit | Tap Sets | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Size | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Thread Type | Pitch Dia. Limit | Shank Type | Each | Each | ||
Taper Chamfer | ||||||||||||
Uncoated High-Speed Steel | ||||||||||||
| 1/2"-28 | 1 21/32" | 3 3/8" | 15/32" | 0.4688" | 4 | UNEF | H3 | Square | 00000000 | 000000 | 00000000 | 000000 |
Plug Chamfer | ||||||||||||
Uncoated High-Speed Steel | ||||||||||||
| 1/2"-28 | 1 21/32" | 3 3/8" | 15/32" | 0.4688" | 4 | UNEF | H3 | Square | 00000000 | 00000 | 00000000 | 00000 |
Bottoming Chamfer | ||||||||||||
Uncoated High-Speed Steel | ||||||||||||
| 1/2"-28 | 1 21/32" | 3 3/8" | 15/32" | 0.4688" | 4 | UNEF | H3 | Square | 00000000 | 00000 | 00000000 | 00000 |
Chip-Clearing Taps for Through Holes
Keep chips clear while tapping. Also known as gun taps, these have spiral-point flutes that push chips ahead of the tap and out of through holes. Because they don't need to be reversed to prevent buildup, they produce threads more efficiently than standard taps and are suitable for production work. They're made of high-speed steel for use on most metal and plastic. With a square shank, they're compatible with tap wrenches and tap holders for drill presses and milling machines. All have a plug chamfer with 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping.
Use uncoated taps for short production runs. Titanium-nitride (TiN) coated taps resist heat and wear better than uncoated taps, letting them last up to twice as long. Titanium-carbonitride (TiCN) coated taps have up to three times the tool life of uncoated taps. Their hard, smooth finish offers superior resistance to chipping, wear, and heat.
For technical drawings and 3-D models, click on a part number.
Thread | Drill Bit | Plug Chamfer | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Thread Type | Pitch Dia. Limit | Each | |
Uncoated High-Speed Steel | |||||||||
| 1/2"-28 | 1 21/32" | 3 3/8" | 15/32" | 0.4688" | 3 | UNEF | H3 | 00000000 | 000000 |
Titanium Nitride (TiN) Coated High-Speed Steel | |||||||||
| 1/2"-28 | 1 21/32" | 3 3/8" | 15/32" | 0.4688" | 3 | UNEF | H3 | 0000000 | 00000 |
Titanium Carbonitride (TiCN) Coated High-Speed Steel | |||||||||
| 1/2"-28 | 1 21/32" | 3 3/8" | 15/32" | 0.4688" | 3 | UNEF | H3 | 0000000 | 00000 |
Tap Sets
These taps are for use on most metal and plastic. They have a square shank that's compatible with tap wrenches and tap holders for drill presses and milling machines.
Use uncoated high-speed steel taps for small-scale tapping jobs.
Taper-chamfer taps have 7-10 chamfered threads at the tip for cutting into the workpiece. They require less torque than other chamfer types, making them a good choice for starting threads and tapping through holes. However, a longer taper means that they cannot thread as close to the bottom of closed-end holes.
Plug-chamfer taps are a versatile choice for most tapping applications. With 3-5 chamfered cutting threads, they require moderate torque and are often used for start-to-finish tapping of through holes and closed-end holes. However, they do not start threads as easily as taper chamfers. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.
Bottoming-chamfer taps cut into the workpiece with just 1-2 chamfered threads. This short chamfer lets them thread holes closer to the bottom than other taps, but they require more torque to start threads.
For technical drawings and 3-D models, click on a part number.
Drill Bit | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Tap Sizes Included | Thread Type | Thread Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Pitch Dia. Limit | Container Type | No. of Pieces | Each | |
Uncoated High-Speed Steel | |||||||||||
| 1/2"-28 | UNEF | 1 21/32" | 3 3/8" | 15/32" | 0.4688" | 4 | H3 | Plastic Case | 3 | 00000000 | 000000 |