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Long-Reach General Purpose Taps
Use the extra-long shank to thread deep and hard-to-reach holes. These taps are made of uncoated high-speed steel and are 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. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.
Thread | Drill Bit | Shank | Plug Chamfer | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Size | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Thread Type | Pitch Dia. Limit | Dia. | Dia. Tolerance | Each | |
Uncoated High-Speed Steel | |||||||||||
| 1/4"-20 | 1 5/8" | 5" | 7 ga. | 0.201" | 4 | UNC | H3 | 0.185" | -0.0015" to 0" | 0000000 | 000000 |
| 5/16"-18 | 1 13/16" | 5 1/2" | F | 0.257" | 4 | UNC | H3 | 0.24" | -0.0015" to 0" | 0000000 | 00000 |
| 3/8"-16 | 2" | 6" | 5/16" | 0.3125" | 4 | UNC | H3 | 0.294" | -0.0015" to 0" | 0000000 | 00000 |
| 1/2"-13 | 2 1/2" | 7" | 27/64" | 0.4219" | 4 | UNC | H3 | 0.4" | -0.0015" to 0" | 0000000 | 00000 |
| 5/8"-11 | 3" | 8" | 17/32" | 0.5313" | 4 | UNC | H3 | 0.503" | -0.0015" to 0" | 0000000 | 000000 |
| 3/4"-10 | 3 1/4" | 9" | 21/32" | 0.6563" | 4 | UNC | H3 | 0.616" | -0.0015" to 0" | 0000000 | 000000 |
| 1"-8 | 4" | 11" | 7/8" | 0.875" | 4 | UNC | H4 | 0.834" | -0.0015" to 0" | 0000000 | 000000 |