System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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For Use On For Use On |
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Flute Type Flute Type |
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![]() | Straight |
![]() | Spiral Point |
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Individual/Set Individual/Set |
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Material Material |
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Application Application |
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Thread Direction Thread Direction |
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Finish Finish |
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Container Type Container Type |
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Maximum Tapping Depth Maximum Tapping Depth |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Drill Bit Size Drill Bit Size |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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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. 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.
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 | ||||||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H2 | Square | 00000000 | 000000 | 00000000 | 000000 |
Titanium Nitride (TiN) Coated High-Speed Steel | ||||||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H2 | Square | 00000000 | 00000 | 000000 | 00 |
Titanium Carbonitride (TiCN) Coated High-Speed Steel | ||||||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H2 | Square | 000000000 | 00000 | 000000000 | 00000 |
Plug Chamfer | ||||||||||||
Uncoated High-Speed Steel | ||||||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | Square | 00000000 | 00000 | 000000 | 00 |
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H2 | Square | 00000000 | 00000 | 00000000 | 00000 |
Titanium Nitride (TiN) Coated High-Speed Steel | ||||||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | Square | 00000000 | 00000 | 000000 | 00 |
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H2 | Square | 00000000 | 00000 | 000000 | 00 |
Titanium Carbonitride (TiCN) Coated High-Speed Steel | ||||||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H2 | Square | 00000000 | 00000 | 000000000 | 00000 |
Bottoming Chamfer | ||||||||||||
Uncoated High-Speed Steel | ||||||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | Square | 00000000 | 00000 | 000000 | 00 |
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H2 | Square | 00000000 | 00000 | 00000000 | 00000 |
Titanium Nitride (TiN) Coated High-Speed Steel | ||||||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | Square | 00000000 | 00000 | 000000 | 00 |
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H2 | Square | 00000000 | 00000 | 000000 | 00 |
Titanium Carbonitride (TiCN) Coated High-Speed Steel | ||||||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H2 | Square | 000000000 | 00000 | 000000000 | 00000 |
Economy Carbon Steel Taps




Often used for thread repair and occasional hand tapping, these carbon steel taps can thread holes in most metal and plastic, but they have a shorter tool life than standard taps.
Taper-chamfer taps have 7-10 chamfered threads at the tip for cutting into the workpiece. This lets them cut with 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 start threads less easily than 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.
Thread | Drill Bit | ||||||||
---|---|---|---|---|---|---|---|---|---|
Size | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Thread Type | Pitch Dia. Limit | Each | |
Taper Chamfer | |||||||||
Uncoated Carbon Steel | |||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H3 | 000000000 | 00000 |
Plug Chamfer | |||||||||
Uncoated Carbon Steel | |||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H3 | 000000000 | 0000 |
Bottoming Chamfer | |||||||||
Uncoated Carbon Steel | |||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | UNC | H3 | 000000000 | 0000 |
Carbide Taps



These taps are solid carbide with an aluminum-titanium-nitride (AlTiN) coating for high strength and excellent wear resistance. Use them on hard and abrasive material, such as heat-treated metal, nickel, and fiberglass. The extreme hardness of carbide taps means they are brittle, so they’re not recommended for hand tapping. A highly rigid setup, such as a CNC machine, is necessary to prevent the tap from breaking.
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. 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.
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 | |||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | 00000000 | 000000 |
Titanium Nitride (TiN) Coated High-Speed Steel | |||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | 0000000 | 00000 |
Titanium Carbonitride (TiCN) Coated High-Speed Steel | |||||||||
2-56 | 7/16" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | 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. 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.
Black-oxide cobalt steel taps have high cutting strength and a long life when used on metals such as steel, stainless steel, and cast iron.
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 | Shank Diameter | Each | |
Black Oxide Cobalt Steel | ||||||||||
2-56 | 7/16" | 6" | 51 ga. | 0.067" | 2 | UNC | H2 | 0.141" | 0000000 | 0000000 |
Taps for Steel and Stainless Steel


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.
For technical drawings and 3-D models, click on a part number.
Taps for Aluminum, Brass, and Plastic


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.
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. Their bottoming chamfer has 1-2 chamfered cutting threads, so they can thread holes closer to the bottom than other taps. However, they'll require more torque to start threads.
For technical drawings and 3-D models, click on a part number.
Taps for Hardened Steel and Iron

Tap threads into hardened steel and iron. These cobalt steel taps have straight flutes for high durability. 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.
Use uncoated taps for short production runs. Titanium-nitride (TiN) coated taps resist heat and wear better than uncoated taps, so they'll last longer when threading similar material.
For technical drawings and 3-D models, click on a part number.
Thread | Drill Bit | Closed-End Hole and Through-Hole Threading | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Size | Lg. | Overall Lg. | Max. Tapping Dp. | Size | Decimal Size Equivalent | No. of Flutes | Thread Type | Pitch Dia. Limit | For Maximum Hardness | Each | |
Uncoated Cobalt Steel | |||||||||||
2-56 | 7/16" | 1 13/16" | 25/64" | 51 ga. | 0.067" | 2 | UNC | H2 | Rockwell C45 | 0000000 | 000000 |
Titanium Nitride (TiN) Coated Cobalt Steel | |||||||||||
2-56 | 7/16" | 1 13/16" | 25/64" | 51 ga. | 0.067" | 2 | UNC | H2 | Rockwell C45 | 0000000 | 00000 |
Taps for Nickel


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.
For technical drawings and 3-D models, click on a part number.
Taps for Titanium

A high helix angle provides the cutting strength needed to tap threads in titanium. These cobalt steel taps have an open flute design that keeps chips clear, so they don't need to be reversed to prevent buildup. With a square shank, they're compatible with 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 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.
For technical drawings and 3-D models, click on a part number.
Thread | Drill Bit | Closed-End Hole Threading | |||||||
---|---|---|---|---|---|---|---|---|---|
Size | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Thread Type | Pitch Dia. Limit | Each | |
Black Oxide Cobalt Steel | |||||||||
2-56 | 1/4" | 1 3/4" | 51 ga. | 0.067" | 2 | UNC | H2 | 0000000 | 000000 |
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.
Uncoated carbon steel taps are for thread repair and occasional tapping. Use uncoated high-speed steel taps for small-scale tapping jobs. Titanium-nitride (TiN) coated high-speed steel taps resist heat and wear better than uncoated taps, letting them last up to twice as long. Titanium-carbonitride (TiCN) coated high-speed steel taps have up to three times the tool life of uncoated taps. Their hard, smooth finish offers superior resistance to chipping, wear, and heat.
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 Carbon Steel | |||||||||||
2-56 | UNC | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | H3 | Plastic Case | 3 | 000000000 | 000000 |
Uncoated High-Speed Steel | |||||||||||
2-56 | UNC | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | H2 | Plastic Case | 3 | 00000000 | 00000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | |||||||||||
2-56 | UNC | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | H2 | Plastic Case | 3 | 00000000 | 00000 |
Titanium-Carbonitride (TiCN) Coated High-Speed Steel | |||||||||||
2-56 | UNC | 7/16" | 1 3/4" | 51 ga. | 0.067" | 3 | H2 | Plastic Case | 3 | 000000000 | 00000 |
No. of Pieces | Tap Sizes Included | Thread Type | Container Type | Each | |
Uncoated High-Speed Steel | |||||
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19 | 1 each of sizes: 0-80 1-64 1-72 2-56 2-64 3-48 3-56 4-40 4-48 5-40 5-44 6-32 6-40 8-32 8-36 10-24 10-32 12-24 12-28 | UNC, UNF | Metal Case | 00000000 | 0000000 |
Chip-Clearing Tap Sets for Through-Holes

Sets include multiple tap sizes for threading different hole diameters. Also known as gun taps, all 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 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. Their plug chamfer starts threads with moderate torque and is good for start-to-finish tapping.
Taps with a gold-oxide finish produce less friction than uncoated taps, but do not last as long as titanium-nitride (TiN) coated taps.
For technical drawings and 3-D models, click on a part number.
No. of Pieces | Chamfer Type | Tap Sizes Included | Thread Type | No. of Flutes | Container Type | Each | |
Gold-Oxide High-Speed Steel | |||||||
---|---|---|---|---|---|---|---|
19 | Plug | 0-80 1-64 1-72 2-56 2-64 3-48 3-56 4-40 4-48 5-40 5-44 6-32 6-40 8-32 8-36 10-24 10-32 12-24 12-28 | UNC, UNF | 2 | Metal Case | 00000000 | 0000000 |
Helical Inserts with Installation Tools

Inserts come with a through-hole tap and installation tool. Also known as Heli-Coil inserts, they have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Inserts Included | Includes | Each | |
18-8 Stainless Steel—Right-Hand Threaded | |||||||
---|---|---|---|---|---|---|---|
2-56 | 0.086" | 3/32" | 3/32" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 0000000 |
2-56 | 0.129" | 3/32" | 3/32" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
2-56 | 0.172" | 3/32" | 3/32" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
2-56 | 0.215" | 3/32" | 3/32" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
Helical Insert Assortments with Installation Tools

Assortments include various sizes of helical inserts and a tap, a drill bit, and an installation tool for each thread size. Also known as Heli-Coil inserts, the inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.
Includes | No. of Inserts Included | Thread Spacing | Drill Bit Size | For Max. Hole Dia. | Each | |
Inch | ||||||
---|---|---|---|---|---|---|
18-8 Stainless Steel | ||||||
1-64 Thread × 0.11" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 2-56 Thread × 0.129" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 3-48 Thread × 0.148" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 4-40 Thread × 0.168" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 6-32 Thread × 0.207" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 8-32 Thread × 0.246" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) Drill Bits Through-Hole Taps Installation Tools | 288 | Coarse | 5/64" 3/32" No. 36 No. 31 No. 26 No. 17 | 5/64" 3/32" 0.1065" 0.12" 0.147" 0.173" | 000000000 | 0000000 |