Search Results
Thread Size Thread Size |
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Flute Type Flute Type |
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 | Spiral |
 | Spiral Point |
Application Application |
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Thread Length Thread Length |
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Maximum Tapping Depth Maximum Tapping Depth |
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Drill Bit Decimal Size Equivalent Drill Bit DecimalSize Equivalent |
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Drill Bit Size Drill Bit Size |
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Pipe and Conduit Thread Taps
for Stainless Steel and Plastic
The spiral flutes on these pipe and conduit taps keep chips clear by drawing them back out of the hole, so there's no need to reverse the tap while cutting threads. All have a square shank, so they're compatible with tap wrenches and tap holders for drill presses and milling machines.
Titanium-nitride (TiN) coated cobalt steel taps can cut threads in plastic and stainless steel. They resist heat and wear better than high-speed steel taps, letting them last up to twice as long. All have a plug chamfer with 3-5 chamfered cutting threads, so they require moderate torque and are good for start-to-finish tapping.
Titanium-Nitride (TiN) Coated Cobalt Steel
Plug Chamfer
Drill Bit | Plug Chamfer | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Type | Threads Per Inch | Thread Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Each | |
| 1/16 | NPT | 27 | 11/16" | 2 1/8" | C | 0.242" | 4 | 0000000 | 000000 |
| 1/16 | NPTF | 27 | 11/16" | 2 1/8" | C | 0.242" | 4 | 0000000 | 00000 |
| 1/8 | NPT | 27 | 3/4" | 2 1/8" | Q | 0.332" | 4 | 0000000 | 00000 |
| 1/8 | NPTF | 27 | 3/4" | 2 1/8" | Q | 0.332" | 4 | 0000000 | 00000 |
| 1/4 | NPT | 18 | 1 1/16" | 2 7/16" | 7/16" | 0.4375" | 4 | 0000000 | 00000 |
| 1/4 | NPTF | 18 | 1 1/16" | 2 7/16" | 7/16" | 0.4375" | 4 | 0000000 | 00000 |
| 3/8 | NPT | 18 | 1 1/16" | 2 9/16" | 9/16" | 0.5625" | 4 | 0000000 | 00000 |
| 3/8 | NPTF | 18 | 1 1/16" | 2 9/16" | 9/16" | 0.5625" | 4 | 0000000 | 00000 |
| 1/2 | NPT | 14 | 1 3/8" | 3 1/8" | 45/64" | 0.7031" | 4 | 0000000 | 00000 |
| 3/4 | NPT | 14 | 1 3/8" | 3 1/4" | 29/32" | 0.9063" | 4 | 0000000 | 000000 |
| 3/4 | NPTF | 14 | 1 3/8" | 3 1/4" | 29/32" | 0.9063" | 4 | 0000000 | 000000 |
| 1 | NPT | 11 1/2 | 1 3/4" | 3 3/4" | 1 9/64" | 1.1406" | 4 | 0000000 | 000000 |
Taps for Steel and Stainless Steel
For Through-Hole Threading
For Closed-End Hole Threading
These taps are made of cobalt steel for higher strength and wear resistance than standard taps. Their flutes are designed to keep chips clear, so they don't need to be reversed to prevent buildup. 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.
Taps for through-hole threading have spiral-point flutes, which push chips ahead of the tap and out of through holes. They're also known as gun taps.
Taps for closed-end hole threading have right-hand spiral flutes. They draw chips back toward the tap while cutting threads to prevent chip accumulation in closed-end holes.
Inch
Thread | Drill Bit | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Thread Type | Pitch Dia. Limit | Each | |
Through-Hole Threading | |||||||||
Black Oxide Cobalt Steel | |||||||||
| 2-56 | 3/8" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | 0000000 | 000000 |
| 3-48 | 7/16" | 1 13/16" | 47 ga. | 0.0785" | 2 | UNC | H2 | 0000000 | 00000 |
| 4-40 | 1/2" | 1 7/8" | 43 ga. | 0.089" | 2 | UNC | H2 | 0000000 | 00000 |
| 4-48 | 1/2" | 1 7/8" | 42 ga. | 0.0935" | 2 | UNF | H2 | 0000000 | 00000 |
| 5-40 | 9/16" | 1 15/16" | 38 ga. | 0.1015" | 2 | UNC | H2 | 0000000 | 00000 |
| 6-32 | 3/8" | 2" | 36 ga. | 0.1065" | 2 | UNC | H3 | 0000000 | 00000 |
| 6-40 | 3/8" | 2" | 33 ga. | 0.113" | 2 | UNF | H3 | 0000000 | 00000 |
| 8-32 | 3/8" | 2 1/8" | 29 ga. | 0.136" | 2 | UNC | H3 | 0000000 | 00000 |
| 8-36 | 3/8" | 2 1/8" | 29 ga. | 0.136" | 2 | UNF | H2 | 0000000 | 00000 |
| 10-24 | 1/2" | 2 3/8" | 25 ga. | 0.1495" | 2 | UNC | H3 | 0000000 | 00000 |
| 10-32 | 1/2" | 2 3/8" | 21 ga. | 0.159" | 2 | UNF | H3 | 0000000 | 00000 |
| 12-24 | 1/2" | 2 3/8" | 16 ga. | 0.177" | 2 | UNC | H3 | 0000000 | 00000 |
| 12-28 | 1/2" | 2 3/8" | 15 ga. | 0.18" | 2 | UNF | H3 | 0000000 | 00000 |
| 1/4"-20 | 5/8" | 2 1/2" | 7 ga. | 0.201" | 3 | UNC | H3 | 0000000 | 00000 |
| 1/4"-28 | 5/8" | 2 1/2" | 3 ga. | 0.213" | 3 | UNF | H3 | 0000000 | 00000 |
| 5/16"-18 | 11/16" | 2 23/32" | F | 0.257" | 3 | UNC | H3 | 0000000 | 00000 |
| 5/16"-24 | 11/16" | 2 23/32" | I | 0.272" | 3 | UNF | H3 | 0000000 | 00000 |
| 3/8"-16 | 3/4" | 2 15/16" | 5/16" | 0.3125" | 3 | UNC | H3 | 0000000 | 00000 |
| 3/8"-24 | 3/4" | 2 15/16" | Q | 0.332" | 3 | UNF | H3 | 0000000 | 00000 |
| 7/16"-14 | 7/8" | 3 5/32" | U | 0.368" | 3 | UNC | H3 | 0000000 | 00000 |
| 7/16"-20 | 7/8" | 3 5/32" | 25/64" | 0.3906" | 3 | UNF | H3 | 0000000 | 00000 |
| 1/2"-13 | 15/16" | 3 3/8" | 27/64" | 0.4219" | 3 | UNC | H3 | 0000000 | 00000 |
| 1/2"-20 | 15/16" | 3 3/8" | 29/64" | 0.4531" | 3 | UNF | H3 | 0000000 | 00000 |
| 9/16"-12 | 1" | 3 19/32" | 31/64" | 0.4844" | 3 | UNC | H3 | 0000000 | 00000 |
| 9/16"-18 | 1" | 3 19/32" | 33/64" | 0.5156" | 3 | UNF | H3 | 0000000 | 00000 |
| 5/8"-11 | 1 3/32" | 3 13/16" | 17/32" | 0.5313" | 3 | UNC | H3 | 0000000 | 00000 |
| 5/8"-18 | 1 3/32" | 3 13/16" | 37/64" | 0.5781" | 3 | UNF | H3 | 0000000 | 00000 |
| 3/4"-10 | 1 7/32" | 4 1/4" | 21/32" | 0.6563" | 3 | UNC | H3 | 0000000 | 00000 |
| 3/4"-16 | 1 7/32" | 4 1/4" | 11/16" | 0.6875" | 3 | UNF | H3 | 0000000 | 00000 |
| 7/8"-9 | 1 11/32" | 4 11/16" | 49/64" | 0.7656" | 3 | UNC | H4 | 0000000 | 00000 |
| 7/8"-14 | 1 11/32" | 4 11/16" | 13/16" | 0.8125" | 3 | UNF | H4 | 0000000 | 00000 |
| 1"-8 | 1 1/2" | 5 1/8" | 7/8" | 0.875" | 3 | UNC | H5 | 0000000 | 000000 |
| 1"-12 | 1 1/2" | 5 1/8" | 59/64" | 0.9219" | 3 | UNF | H4 | 0000000 | 000000 |
Closed-End Hole Threading | |||||||||
Black Oxide Cobalt Steel | |||||||||
| 2-56 | 13/32" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | 00000000 | 00000 |
| 4-40 | 1/2" | 1 7/8" | 43 ga. | 0.089" | 2 | UNC | H2 | 00000000 | 00000 |
| 4-48 | 17/32" | 1 7/8" | 42 ga. | 0.0935" | 2 | UNF | H2 | 00000000 | 00000 |
| 5-40 | 19/32" | 1 15/16" | 38 ga. | 0.1015" | 2 | UNC | H2 | 00000000 | 00000 |
| 6-32 | 3/8" | 2" | 36 ga. | 0.1065" | 2 | UNC | H3 | 00000000 | 00000 |
| 6-40 | 3/8" | 2" | 33 ga. | 0.113" | 2 | UNF | H3 | 00000000 | 00000 |
| 8-32 | 3/8" | 2 1/8" | 29 ga. | 0.136" | 3 | UNC | H3 | 00000000 | 00000 |
| 10-24 | 1/2" | 2 3/8" | 25 ga. | 0.1495" | 3 | UNC | H3 | 00000000 | 00000 |
| 10-32 | 1/2" | 2 3/8" | 21 ga. | 0.159" | 3 | UNF | H3 | 00000000 | 00000 |
| 12-24 | 1/2" | 2 7/16" | 16 ga. | 0.177" | 3 | UNC | H3 | 00000000 | 00000 |
| 12-28 | 1/2" | 2 7/16" | 15 ga. | 0.18" | 3 | UNF | H3 | 00000000 | 00000 |
| 1/4"-20 | 5/8" | 2 1/2" | 7 ga. | 0.201" | 3 | UNC | H3 | 00000000 | 00000 |
| 1/4"-28 | 5/8" | 2 1/2" | 3 ga. | 0.213" | 3 | UNF | H3 | 00000000 | 00000 |
| 5/16"-18 | 11/16" | 2 23/32" | F | 0.257" | 3 | UNC | H3 | 00000000 | 00000 |
| 5/16"-24 | 11/16" | 2 23/32" | I | 0.272" | 3 | UNF | H3 | 00000000 | 00000 |
| 3/8"-16 | 3/4" | 2 15/16" | 5/16" | 0.3125" | 3 | UNC | H3 | 00000000 | 00000 |
| 3/8"-24 | 3/4" | 2 15/16" | Q | 0.332" | 3 | UNF | H3 | 00000000 | 00000 |
| 7/16"-14 | 7/8" | 3 5/32" | U | 0.368" | 3 | UNC | H3 | 00000000 | 00000 |
| 7/16"-20 | 7/8" | 3 5/32" | 25/64" | 0.3906" | 3 | UNF | H3 | 00000000 | 00000 |
| 1/2"-13 | 15/16" | 3 3/8" | 27/64" | 0.4219" | 3 | UNC | H3 | 00000000 | 00000 |
| 1/2"-20 | 15/16" | 3 3/8" | 29/64" | 0.4531" | 3 | UNF | H3 | 00000000 | 00000 |
| 5/8"-11 | 1 3/32" | 3 13/16" | 17/32" | 0.5313" | 3 | UNC | H3 | 00000000 | 00000 |
| 5/8"-18 | 1 3/32" | 3 13/16" | 37/64" | 0.5781" | 3 | UNF | H3 | 00000000 | 00000 |
| 3/4"-10 | 1 7/32" | 4 1/4" | 21/32" | 0.6563" | 4 | UNC | H3 | 00000000 | 00000 |
| 3/4"-16 | 1 7/32" | 4 1/4" | 11/16" | 0.6875" | 4 | UNF | H3 | 00000000 | 00000 |
| 7/8"-9 | 1 11/32" | 4 11/16" | 49/64" | 0.7656" | 4 | UNC | H4 | 00000000 | 000000 |
| 7/8"-14 | 1 11/32" | 4 11/16" | 13/16" | 0.8125" | 4 | UNF | H4 | 00000000 | 000000 |
| 1"-8 | 1 1/2" | 5 1/8" | 7/8" | 0.875" | 4 | UNC | H5 | 00000000 | 000000 |
| 1"-12 | 1 1/2" | 5 1/8" | 59/64" | 0.9219" | 4 | UNF | H5 | 00000000 | 000000 |
Metric
Thread | Drill Bit | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Pitch Dia. Limit | Each | |
Through-Hole Threading | |||||||||
Black Oxide Cobalt Steel | |||||||||
| M3 | 0.5 | 9/16" | 1 15/16" | 2.5 mm | 0.0984" | 2 | D3 | 0000000 | 000000 |
| M3.5 | 0.6 | 3/8" | 2" | 2.9 mm | 0.1142" | 2 | D4 | 0000000 | 00000 |
| M4 | 0.7 | 3/8" | 2 1/8" | 3.3 mm | 0.1299" | 2 | D4 | 0000000 | 00000 |
| M5 | 0.8 | 1/2" | 2 3/8" | 4.2 mm | 0.1653" | 2 | D4 | 0000000 | 00000 |
| M6 | 1 | 5/8" | 2 1/2" | 5 mm | 0.1968" | 3 | D5 | 0000000 | 00000 |
| M7 | 1 | 11/16" | 2 23/32" | 6 mm | 0.2362" | 3 | D5 | 0000000 | 00000 |
| M8 | 1 | 11/16" | 2 23/32" | 6.9 mm | 0.2716" | 3 | D5 | 0000000 | 00000 |
| M8 | 1.25 | 11/16" | 2 23/32" | 6.7 mm | 0.2637" | 3 | D5 | 0000000 | 00000 |
| M10 | 1.25 | 3/4" | 2 15/16" | 8.7 mm | 0.3425" | 3 | D5 | 0000000 | 00000 |
| M10 | 1.5 | 3/4" | 2 15/16" | 8.5 mm | 0.3346" | 3 | D6 | 0000000 | 00000 |
| M12 | 1.25 | 15/16" | 3 3/8" | 10.8 mm | 0.4251" | 3 | D6 | 0000000 | 00000 |
| M12 | 1.75 | 15/16" | 3 3/8" | 10.2 mm | 0.4015" | 3 | D6 | 0000000 | 00000 |
| M14 | 1.5 | 1" | 3 19/32" | 12.5 mm | 0.4921" | 3 | D6 | 0000000 | 00000 |
| M14 | 2 | 1" | 3 19/32" | 12 mm | 0.4724" | 3 | D7 | 0000000 | 00000 |
| M16 | 1.5 | 1 3/32" | 3 13/16" | 14.5 mm | 0.5709" | 3 | D6 | 0000000 | 00000 |
| M16 | 2 | 1 3/32" | 3 13/16" | 14 mm | 0.5512" | 3 | D7 | 0000000 | 00000 |
| M18 | 1.5 | 1 3/32" | 4 1/32" | 16.5 mm | 0.6496" | 3 | D6 | 0000000 | 00000 |
| M18 | 2.5 | 1 7/32" | 4 1/32" | 15.5 mm | 0.6102" | 3 | D7 | 0000000 | 00000 |
Closed-End Hole Threading | |||||||||
Black Oxide Cobalt Steel | |||||||||
| M3 | 0.5 | 9/16" | 1 15/16" | 2.5 mm | 0.0984" | 2 | D3 | 0000000 | 00000 |
| M3.5 | 0.6 | 3/8" | 2" | 2.9 mm | 0.1142" | 2 | D4 | 0000000 | 00000 |
| M4 | 0.7 | 3/8" | 2 1/8" | 3.3 mm | 0.1299" | 3 | D4 | 0000000 | 00000 |
| M5 | 0.8 | 1/2" | 2 3/8" | 4.2 mm | 0.1653" | 3 | D4 | 0000000 | 00000 |
| M6 | 1 | 5/8" | 2 1/2" | 5 mm | 0.1968" | 3 | D5 | 0000000 | 00000 |
| M7 | 1 | 11/16" | 2 23/32" | 6 mm | 0.2362" | 3 | D5 | 0000000 | 00000 |
| M8 | 1 | 11/16" | 2 23/32" | 6.9 mm | 0.2716" | 3 | D5 | 0000000 | 00000 |
| M8 | 1.25 | 11/16" | 2 23/32" | 6.7 mm | 0.2637" | 3 | D5 | 0000000 | 00000 |
| M10 | 1.25 | 3/4" | 2 15/16" | 8.7 mm | 0.3425" | 3 | D5 | 0000000 | 00000 |
| M10 | 1.5 | 3/4" | 2 15/16" | 8.5 mm | 0.3346" | 3 | D6 | 0000000 | 00000 |
| M12 | 1.25 | 15/16" | 3 3/8" | 10.8 mm | 0.4251" | 3 | D5 | 0000000 | 00000 |
| M12 | 1.75 | 15/16" | 3 3/8" | 10.2 mm | 0.4015" | 3 | D6 | 0000000 | 00000 |
Long-Reach Chip-Clearing Taps for Through Holes
Clear chips while tapping deep and hard-to-reach holes. These taps have an extra-long shank for extended reach. Also known as gun taps, their spiral-point flutes push chips ahead of the tap and out of through holes. They don't need to be reversed to prevent buildup, so they produce threads more efficiently than standard taps and are suitable for production work.
Made of cobalt steel, these taps have high cutting strength and long tool life when used on most metal and plastic. Their square shank is 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.
Thread | Drill Bit | Plug Chamfer | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Thread Type | Pitch Dia. Limit | Each | |
Black Oxide Cobalt Steel | |||||||||
| 2-56 | 7/16" | 6" | 51 ga. | 0.067" | 2 | UNC | H2 | 0000000 | 000000 |
| 4-40 | 5/16" | 6" | 43 ga. | 0.089" | 2 | UNC | H2 | 0000000 | 00000 |
| 6-32 | 3/8" | 6" | 36 ga. | 0.1065" | 2 | UNC | H3 | 0000000 | 00000 |
| 8-32 | 3/8" | 6" | 29 ga. | 0.136" | 2 | UNC | H3 | 0000000 | 00000 |
| 10-24 | 1/2" | 6" | 25 ga. | 0.1495" | 2 | UNC | H3 | 0000000 | 00000 |
| 10-32 | 1/2" | 6" | 21 ga. | 0.159" | 2 | UNF | H3 | 0000000 | 00000 |
| 1/4"-20 | 5/8" | 6" | 7 ga. | 0.201" | 3 | UNC | H3 | 0000000 | 00000 |
| 1/4"-28 | 5/8" | 6" | 3 ga. | 0.213" | 3 | UNF | H3 | 0000000 | 00000 |
| 5/16"-18 | 11/16" | 6" | F | 0.257" | 3 | UNC | H3 | 0000000 | 00000 |
| 5/16"-24 | 11/16" | 6" | I | 0.272" | 3 | UNF | H3 | 0000000 | 00000 |
| 3/8"-16 | 3/4" | 6" | 5/16" | 0.3125" | 3 | UNC | H3 | 0000000 | 00000 |
| 3/8"-24 | 3/4" | 6" | Q | 0.332" | 3 | UNF | H3 | 0000000 | 00000 |
| 7/16"-14 | 7/8" | 6" | U | 0.368" | 3 | UNC | H3 | 0000000 | 00000 |
| 7/16"-20 | 7/8" | 6" | 25/64" | 0.3906" | 3 | UNF | H3 | 0000000 | 00000 |
| 1/2"-13 | 15/16" | 6" | 27/64" | 0.4219" | 3 | UNC | H3 | 0000000 | 00000 |
| 1/2"-20 | 15/16" | 6" | 29/64" | 0.4531" | 3 | UNF | H3 | 0000000 | 00000 |
Taps for Nickel
For Through-Hole Threading
For Closed-End Hole Threading
To tap nickel and other hard material, these cobalt steel taps have high cutting strength. Their spiral flutes keep chips clear, so they don't need to be reversed to prevent buildup. 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.
Taps for through-hole threading push chips ahead of the tap and out of through holes.
Taps for closed-end hole threading draw chips back toward the tap while cutting threads, preventing chip accumulation in closed-end holes.
Inch
Thread | Drill Bit | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Thread Type | Pitch Dia. Limit | Each | |
Through-Hole Threading | |||||||||
Black Oxide Cobalt Steel | |||||||||
| 2-56 | 1/4" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | 00000000 | 000000 |
| 4-40 | 5/16" | 1 7/8" | 43 ga. | 0.089" | 2 | UNC | H3 | 00000000 | 00000 |
| 4-48 | 5/16" | 1 7/8" | 42 ga. | 0.0935" | 2 | UNF | H2 | 00000000 | 00000 |
| 5-40 | 3/8" | 1 15/16" | 38 ga. | 0.1015" | 3 | UNC | H2 | 00000000 | 00000 |
| 6-32 | 13/32" | 2" | 36 ga. | 0.1065" | 3 | UNC | H3 | 00000000 | 00000 |
| 6-40 | 13/32" | 2" | 33 ga. | 0.113" | 3 | UNF | H2 | 00000000 | 00000 |
| 8-32 | 7/16" | 2 1/8" | 29 ga. | 0.136" | 3 | UNC | H3 | 00000000 | 00000 |
| 8-36 | 7/16" | 2 1/8" | 29 ga. | 0.136" | 3 | UNF | H2 | 00000000 | 00000 |
| 10-24 | 17/32" | 2 3/8" | 25 ga. | 0.1495" | 3 | UNC | H3 | 00000000 | 00000 |
| 10-32 | 17/32" | 2 3/8" | 21 ga. | 0.159" | 3 | UNF | H3 | 00000000 | 00000 |
| 12-24 | 1/2" | 2 3/8" | 16 ga. | 0.177" | 3 | UNC | H3 | 00000000 | 00000 |
| 1/4"-20 | 9/16" | 2 1/2" | 7 ga. | 0.201" | 3 | UNC | H3 | 00000000 | 00000 |
| 1/4"-28 | 9/16" | 2 1/2" | 3 ga. | 0.213" | 3 | UNF | H3 | 00000000 | 00000 |
| 5/16"-18 | 21/32" | 2 23/32" | F | 0.257" | 3 | UNC | H3 | 00000000 | 00000 |
| 5/16"-24 | 21/32" | 2 23/32" | I | 0.272" | 3 | UNF | H3 | 00000000 | 00000 |
| 3/8"-16 | 23/32" | 2 15/16" | 5/16" | 0.3125" | 3 | UNC | H3 | 00000000 | 00000 |
| 3/8"-24 | 23/32" | 2 15/16" | Q | 0.332" | 3 | UNF | H3 | 00000000 | 00000 |
| 7/16"-14 | 27/32" | 3 5/32" | U | 0.368" | 3 | UNC | H3 | 00000000 | 00000 |
| 7/16"-20 | 27/32" | 3 5/32" | 25/64" | 0.3906" | 3 | UNF | H3 | 00000000 | 00000 |
| 1/2"-13 | 15/16" | 3 3/8" | 27/64" | 0.4219" | 3 | UNC | H3 | 00000000 | 00000 |
| 1/2"-20 | 15/16" | 3 3/8" | 29/64" | 0.4531" | 3 | UNF | H3 | 00000000 | 00000 |
| 9/16"-12 | 1" | 3 19/32" | 31/64" | 0.4844" | 3 | UNC | H3 | 00000000 | 00000 |
| 9/16"-18 | 1" | 3 19/32" | 33/64" | 0.5156" | 3 | UNF | H3 | 00000000 | 00000 |
| 5/8"-11 | 1 1/16" | 3 13/16" | 17/32" | 0.5313" | 3 | UNC | H3 | 00000000 | 00000 |
| 5/8"-18 | 1 1/16" | 3 13/16" | 37/64" | 0.5781" | 3 | UNF | H3 | 00000000 | 00000 |
| 3/4"-10 | 1 3/16" | 4 1/4" | 21/32" | 0.6563" | 3 | UNC | H3 | 00000000 | 000000 |
| 3/4"-16 | 1 3/16" | 4 1/4" | 11/16" | 0.6875" | 3 | UNF | H3 | 00000000 | 000000 |
Closed-End Hole Threading | |||||||||
Black Oxide Cobalt Steel | |||||||||
| 2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H2 | 0000000 | 00000 |
| 4-40 | 9/16" | 1 7/8" | 43 ga. | 0.089" | 3 | UNC | H2 | 0000000 | 00000 |
| 4-48 | 9/16" | 1 7/8" | 42 ga. | 0.0935" | 3 | UNF | H2 | 0000000 | 00000 |
| 5-40 | 1/4" | 1 15/16" | 38 ga. | 0.1015" | 3 | UNC | H2 | 0000000 | 00000 |
| 6-32 | 11/32" | 2" | 36 ga. | 0.1065" | 3 | UNC | H3 | 0000000 | 00000 |
| 6-40 | 11/32" | 2" | 33 ga. | 0.113" | 3 | UNF | H3 | 0000000 | 00000 |
| 8-32 | 5/16" | 2 1/8" | 29 ga. | 0.136" | 3 | UNC | H3 | 0000000 | 00000 |
| 10-24 | 15/32" | 2 3/8" | 25 ga. | 0.1495" | 3 | UNC | H3 | 0000000 | 00000 |
| 10-32 | 15/32" | 2 3/8" | 21 ga. | 0.159" | 3 | UNF | H3 | 0000000 | 00000 |
| 12-24 | 13/32" | 2 3/8" | 16 ga. | 0.177" | 3 | UNC | H3 | 0000000 | 00000 |
| 12-28 | 7/16" | 2 3/8" | 15 ga. | 0.18" | 3 | UNF | H3 | 0000000 | 00000 |
| 1/4"-20 | 7/16" | 2 1/2" | 7 ga. | 0.201" | 3 | UNC | H3 | 0000000 | 00000 |
| 1/4"-28 | 7/16" | 2 1/2" | 3 ga. | 0.213" | 3 | UNF | H3 | 0000000 | 00000 |
| 5/16"-18 | 15/32" | 2 23/32" | F | 0.257" | 3 | UNC | H3 | 0000000 | 00000 |
| 5/16"-24 | 15/32" | 2 23/32" | I | 0.272" | 3 | UNF | H3 | 0000000 | 00000 |
| 3/8"-16 | 19/32" | 2 15/16" | 5/16" | 0.3125" | 3 | UNC | H3 | 0000000 | 00000 |
| 3/8"-24 | 19/32" | 2 15/16" | Q | 0.332" | 3 | UNF | H3 | 0000000 | 00000 |
| 7/16"-14 | 23/32" | 3 5/32" | U | 0.368" | 3 | UNC | H3 | 0000000 | 00000 |
| 7/16"-20 | 23/32" | 3 5/32" | 25/64" | 0.3906" | 3 | UNF | H3 | 0000000 | 00000 |
| 1/2"-13 | 1/4" | 3 3/8" | 27/64" | 0.4219" | 3 | UNC | H3 | 0000000 | 00000 |
| 1/2"-20 | 1/4" | 3 3/8" | 29/64" | 0.4531" | 3 | UNF | H3 | 0000000 | 00000 |
| 5/8"-11 | 29/32" | 3 13/16" | 17/32" | 0.5313" | 3 | UNC | H3 | 0000000 | 000000 |
| 5/8"-18 | 15/16" | 3 13/16" | 37/64" | 0.5781" | 3 | UNF | H3 | 0000000 | 000000 |
| 3/4"-10 | 1" | 4 1/4" | 21/32" | 0.6563" | 3 | UNC | H3 | 0000000 | 000000 |
| 3/4"-16 | 1" | 4 1/4" | 11/16" | 0.6875" | 3 | UNF | H3 | 0000000 | 000000 |
Metric
Thread | Drill Bit | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Pitch Dia. Limit | Each | |
Through-Hole Threading | |||||||||
Black Oxide Cobalt Steel | |||||||||
| M3 | 0.5 | 3/8" | 1 15/16" | 2.5 mm | 0.0984" | 3 | D3 | 0000000 | 000000 |
| M3.5 | 0.6 | 13/32" | 2" | 2.9 mm | 0.1142" | 3 | D4 | 0000000 | 00000 |
| M4 | 0.7 | 7/16" | 2 1/8" | 3.3 mm | 0.1299" | 3 | D4 | 0000000 | 00000 |
| M5 | 0.8 | 17/32" | 2 3/8" | 4.2 mm | 0.1653" | 3 | D4 | 0000000 | 00000 |
| M6 | 1 | 9/16" | 2 1/2" | 5 mm | 0.1968" | 3 | D5 | 0000000 | 00000 |
| M7 | 1 | 21/32" | 2 23/32" | 6 mm | 0.2362" | 3 | D5 | 0000000 | 00000 |
| M8 | 1 | 21/32" | 2 23/32" | 6.9 mm | 0.2716" | 3 | D5 | 0000000 | 00000 |
| M8 | 1.25 | 21/32" | 2 23/32" | 6.7 mm | 0.2637" | 3 | D5 | 0000000 | 00000 |
| M10 | 1.25 | 23/32" | 2 15/16" | 8.7 mm | 0.3425" | 3 | D5 | 0000000 | 00000 |
| M10 | 1.5 | 23/32" | 2 15/16" | 8.5 mm | 0.3346" | 3 | D6 | 0000000 | 00000 |
| M12 | 1.25 | 31/32" | 3 3/8" | 10.8 mm | 0.4251" | 3 | D5 | 0000000 | 00000 |
| M12 | 1.75 | 31/32" | 3 3/8" | 10.2 mm | 0.4015" | 3 | D6 | 0000000 | 00000 |
| M14 | 1.5 | 1" | 3 19/32" | 12.5 mm | 0.4921" | 3 | D6 | 0000000 | 00000 |
| M14 | 2 | 1" | 3 19/32" | 12 mm | 0.4724" | 3 | D7 | 0000000 | 00000 |
| M16 | 1.5 | 1 1/16" | 3 13/16" | 14.5 mm | 0.5709" | 3 | D6 | 0000000 | 00000 |
| M16 | 2 | 1 1/16" | 3 13/16" | 14 mm | 0.5512" | 3 | D7 | 0000000 | 00000 |
Closed-End Hole Threading | |||||||||
Black Oxide Cobalt Steel | |||||||||
| M3 | 0.5 | 5/16" | 1 15/16" | 2.5 mm | 0.0984" | 3 | D3 | 0000000 | 00000 |
| M3.5 | 0.6 | 3/8" | 2" | 2.9 mm | 0.1142" | 3 | D4 | 0000000 | 00000 |
| M4 | 0.7 | 3/8" | 2 1/8" | 3.3 mm | 0.1299" | 3 | D4 | 0000000 | 00000 |
| M5 | 0.8 | 1/2" | 2 3/8" | 4.2 mm | 0.1653" | 3 | D4 | 0000000 | 00000 |
| M6 | 1 | 5/8" | 2 1/2" | 5 mm | 0.1968" | 3 | D5 | 0000000 | 00000 |
| M7 | 1 | 11/16" | 2 23/32" | 6 mm | 0.2362" | 3 | D5 | 0000000 | 00000 |
| M8 | 1 | 11/16" | 2 23/32" | 6.9 mm | 0.2716" | 3 | D5 | 0000000 | 00000 |
| M8 | 1.25 | 11/16" | 2 23/32" | 6.7 mm | 0.2637" | 3 | D5 | 0000000 | 00000 |
| M10 | 1.25 | 3/4" | 2 15/16" | 8.7 mm | 0.3425" | 3 | D5 | 0000000 | 00000 |
| M10 | 1.5 | 3/4" | 2 15/16" | 8.5 mm | 0.3346" | 3 | D6 | 0000000 | 00000 |
| M12 | 1.25 | 15/16" | 3 3/8" | 10.8 mm | 0.4251" | 3 | D5 | 0000000 | 00000 |
| M12 | 1.75 | 15/16" | 3 3/8" | 10.2 mm | 0.4015" | 3 | D6 | 0000000 | 00000 |
Taps for Aluminum, Brass, and Plastic
For Through-Hole Threading
Coated with chromium carbide or titanium carbonitride (TiCN), these cobalt steel taps cut smoothly through soft material to produce accurate threads. Their square shank is compatible with tap wrenches and tap holders for drill presses and milling machines.
Taps for through-hole threading have left-hand spiral flutes to push chips ahead of the tap and out of through holes. All have a plug chamfer with 3-5 chamfered cutting threads, so they start threads with moderate torque and are good for start-to-finish tapping.
Inch
Thread | Drill Bit | Through-Hole Threading | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Lg. | Overall Lg. | Size | Decimal Size Equivalent | Thread Type | Pitch Dia. Limit | No. of Flutes | Each | |
Chromium Carbide Cobalt Steel | |||||||||
| 2-56 | 5/16" | 1 49/64" | 51 ga. | 0.067" | UNC | H2 | 2 | 0000000 | 000000 |
| 4-40 | 5/16" | 2 13/64" | 43 ga. | 0.089" | UNC | H2 | 2 | 0000000 | 00000 |
| 5-40 | 5/16" | 2 13/64" | 38 ga. | 0.1015" | UNC | H2 | 2 | 0000000 | 00000 |
| 6-32 | 11/32" | 2 13/64" | 36 ga. | 0.1065" | UNC | H3 | 2 | 0000000 | 00000 |
| 8-32 | 7/16" | 2 31/64" | 29 ga. | 0.136" | UNC | H3 | 2 | 0000000 | 00000 |
| 10-24 | 15/32" | 2 49/64" | 25 ga. | 0.1495" | UNC | H3 | 2 | 0000000 | 00000 |
| 10-32 | 15/32" | 2 49/64" | 21 ga. | 0.159" | UNF | H3 | 2 | 0000000 | 00000 |
| 1/4"-20 | 19/32" | 3 5/32" | 7 ga. | 0.201" | UNC | H3 | 2 | 0000000 | 00000 |
| 1/4"-28 | 19/32" | 3 5/32" | 3 ga. | 0.213" | UNF | H3 | 2 | 0000000 | 00000 |
| 5/16"-18 | 19/32" | 3 35/64" | F | 0.257" | UNC | H3 | 2 | 0000000 | 00000 |
| 3/8"-16 | 3/4" | 3 15/16" | 5/16" | 0.3125" | UNC | H3 | 2 | 0000000 | 00000 |
| 7/16"-14 | 23/32" | 3 15/16" | U | 0.368" | UNC | H3 | 3 | 0000000 | 00000 |
| 1/2"-13 | 29/32" | 4 21/64" | 27/64" | 0.4219" | UNC | H4 | 3 | 0000000 | 00000 |
| 1/2"-20 | 29/32" | 4 21/64" | 29/64" | 0.4531" | UNF | H3 | 3 | 0000000 | 00000 |
Metric
Thread | Drill Bit | Through-Hole Threading | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Lg. | Overall Lg. | Size | Decimal Size Equivalent | Pitch Dia. Limit | No. of Flutes | Each | |
Chromium Carbide Cobalt Steel | |||||||||
| M3 | 0.5 | 5/16" | 2 13/64" | 2.5 mm | 0.0984" | D3 | 2 | 0000000 | 000000 |
| M3.5 | 0.6 | 11/32" | 2 13/64" | 2.9 mm | 0.1142" | D4 | 2 | 0000000 | 00000 |
| M4 | 0.7 | 7/16" | 2 31/64" | 3.3 mm | 0.1299" | D4 | 2 | 0000000 | 00000 |
| M5 | 0.8 | 15/32" | 2 49/64" | 4.2 mm | 0.1654" | D4 | 2 | 0000000 | 00000 |
| M6 | 1 | 15/32" | 3 5/32" | 5 mm | 0.1968" | D5 | 2 | 0000000 | 00000 |
| M7 | 1 | 19/32" | 3 35/64" | 6 mm | 0.2362" | D5 | 2 | 0000000 | 00000 |
| M8 | 1.25 | 19/32" | 3 35/64" | 6.7 mm | 0.2638" | D5 | 2 | 0000000 | 00000 |
| M10 | 1.25 | 23/32" | 3 15/16" | 8.7 mm | 0.3425" | D5 | 2 | 0000000 | 00000 |
| M10 | 1.5 | 23/32" | 3 15/16" | 8.5 mm | 0.3346" | D6 | 2 | 0000000 | 00000 |
| M12 | 1.25 | 27/32" | 4 21/64" | 10.8 mm | 0.4251" | D6 | 3 | 0000000 | 00000 |
| M12 | 1.5 | 27/32" | 4 21/64" | 10.5 mm | 0.4133" | D6 | 3 | 0000000 | 00000 |
| M12 | 1.75 | 27/32" | 4 21/64" | 10.2 mm | 0.4016" | D6 | 3 | 0000000 | 00000 |