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 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Size | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Thread Type | Pitch Dia. Limit | Shank Type | Each | |
Taper Chamfer | ||||||||||
Uncoated High-Speed Steel | ||||||||||
1/2"-40 | 1 21/32" | 3 3/8" | 12 mm | 0.4724" | 6 | UNS | H2 | Square | 00000000 | 000000 |
Plug Chamfer | ||||||||||
Uncoated High-Speed Steel | ||||||||||
1/2"-40 | 1 21/32" | 3 3/8" | 12 mm | 0.4724" | 6 | UNS | H2 | Square | 00000000 | 00000 |
Bottoming Chamfer | ||||||||||
Uncoated High-Speed Steel | ||||||||||
1/2"-40 | 1 21/32" | 3 3/8" | 12 mm | 0.4724" | 6 | UNS | H2 | Square | 00000000 | 00000 |