British Standard Thread Taps

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	Thread Type Thread Type

	For Insert Thread Type For Insert Thread Type

BSPP

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Pitch Thread Pitch

	For Use On For Use On

	Component Component

Die

Tap

	Number of Pieces Number of Pieces

117

	Flute Type Flute Type

	Straight
	Spiral

	Number of Drill Bits Number of Drill Bits

	Chamfer Type Chamfer Type

Plug

Bottoming

Taper

	Shape Shape

	Hex

	Number of Taps Number of Taps

	Pipe Size Pipe Size

	Drill Bit Material Drill Bit Material

Steel

	Number of Dies Number of Dies

	Thread Direction Thread Direction

Right Hand

	Individual/Set Individual/Set

Individual

Set

	Application Application

Through-Hole Threading

Closed-End Hole Threading

	Container Type Container Type

Plastic Case

Fabric Pouch

	Width Width

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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54 Products

Pipe and Conduit Thread Taps

Bottoming Chamfer

Create threads sized for pipe and conduit. For use on 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. They have a square shank that's compatible with tap wrenches and tap holders 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.

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.

BSPP and BSPT

					Drill Bit			Bottoming Chamfer
Pipe Size	Thread Type	Threads Per Inch	Thread Lg.	Overall Lg.	Size	Decimal Size Equivalent	No. of Flutes		Each
Uncoated High-Speed Steel
1/8	BSPP	28	3/4"	2 1/8"	8.8 mm	0.3464"	4	0000000	000000
1/8	BSPT	28	3/4"	2 1/8"	8.4 mm	0.3307"	4	0000000	00000
1/4	BSPP	19	1 1/16"	2 7/16"	11.8 mm	0.4645"	4	0000000	00000
1/4	BSPT	19	1 1/16"	2 7/16"	11.2 mm	0.4409"	4	0000000	00000
3/8	BSPP	19	1 1/16"	2 9/16"	15 mm	0.5905"	4	0000000	00000
3/8	BSPT	19	1 1/16"	2 9/16"	14.5 mm	0.5709"	4	0000000	00000
1/2	BSPP	14	1 3/8"	3 1/8"	19 mm	0.748"	4	0000000	00000
1/2	BSPT	14	1 3/8"	3 1/8"	18 mm	0.7087"	4	0000000	00000
3/4	BSPP	14	1 3/8"	3 1/4"	24 mm	0.9449"	5	0000000	00000
3/4	BSPT	14	1 3/8"	3 1/4"	22 mm	0.8661"	5	0000000	00000
1	BSPP	11	1 3/4"	3 3/4"	30 mm	1.1811"	5	0000000	00000
1	BSPT	11	1 3/4"	3 3/4"	30 mm	1.1811"	5	0000000	00000
1 1/4	BSPP	11	1 3/4"	4"	39.5 mm	1.5551"	5	0000000	000000
1 1/4	BSPT	11	1 3/4"	4"	38.5 mm	1.5157"	5	0000000	000000
1 1/2	BSPP	11	1 3/4"	4 1/4"	45 mm	1.7716"	7	0000000	000000
1 1/2	BSPT	11	1 3/4"	4 1/4"	44.5 mm	1.7519"	7	0000000	000000
2	BSPP	11	1 3/4"	4 1/2"	57 mm	2.244"	7	0000000	000000
2	BSPT	11	1 3/4"	4 1/2"	56 mm	2.2047"	7	0000000	000000
Titanium Nitride (TiN) Coated High-Speed Steel
1/8	BSPP	28	3/4"	2 1/8"	8.8 mm	0.3464"	4	0000000	00000
1/8	BSPT	28	3/4"	2 1/8"	8.4 mm	0.3307"	4	0000000	00000
1/4	BSPP	19	1 1/16"	2 7/16"	11.8 mm	0.4645"	4	0000000	00000
1/4	BSPT	19	1 1/16"	2 7/16"	11.2 mm	0.4409"	4	0000000	00000
3/8	BSPP	19	1 1/16"	2 9/16"	15 mm	0.5905"	4	0000000	00000
3/8	BSPT	19	1 1/16"	2 9/16"	14.5 mm	0.5709"	4	0000000	00000
1/2	BSPP	14	1 3/8"	3 1/8"	19 mm	0.748"	4	0000000	00000
1/2	BSPT	14	1 3/8"	3 1/8"	18 mm	0.7087"	4	0000000	00000
3/4	BSPP	14	1 3/8"	3 1/4"	24 mm	0.9449"	4	0000000	00000
3/4	BSPT	14	1 3/8"	3 1/4"	22 mm	0.8661"	4	0000000	00000
1	BSPP	11	1 3/4"	3 3/4"	30 mm	1.1811"	6	0000000	00000
1	BSPT	11	1 3/4"	3 3/4"	30 mm	1.1811"	6	0000000	00000
1 1/4	BSPP	11	1 3/4"	4"	39.5 mm	1.5551"	6	0000000	000000
1 1/2	BSPP	11	1 3/4"	4 1/4"	45 mm	1.7716"	6	0000000	000000

Pipe and Conduit Thread Taps with Two Threading Ends

End View

With a taper chamfer on one threading end and a bottoming chamfer on the other, these pipe and conduit taps start threads easily and are good for threading close to the bottom of closed-end holes. The taper chamfer has 7-10 chamfered cutting threads to drive into the workpiece and start threads with less torque than other chamfer types. The bottoming chamfer has 1-2 chamfered cutting threads to create full threads near the bottom of closed-end holes. To tap threads, turn the tap with an open-end wrench or drive it at either end using an L-key or ratchet wrench. All are made of high-speed steel and are for use on most metal and plastic.

					Drill Bit					Taper and Bottoming Chamfers
Pipe Size	Thread Type	Threads Per Inch	Thread Lg.	Overall Lg.	Size	Decimal Size Equivalent	No. of Flutes	For Wrench Size, mm	For Hex Drive Size, mm		Each
Uncoated High-Speed Steel
1/4	BSPP	19	55/64"	2 3/4"	11.8 mm	0.4645"	4	8	4	0000000	000000
3/8	BSPP	19	55/64"	2 3/4"	15.3 mm	0.6024"	4	12	4	0000000	00000
1/2	BSPP	14	15/16"	3 9/64"	19 mm	0.748"	4	15	6	0000000	00000
3/4	BSPP	14	1 1/16"	3 35/64"	24.5 mm	0.9646"	4	19	8	0000000	000000
1	BSPP	11	1 9/64"	3 15/16"	30.5 mm	1.2008"	4	24	10	0000000	000000

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.

Uncoated high-speed steel taps are for use on plastic. They have a bottoming chamfer that cuts into the workpiece with 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.

Uncoated High-Speed Steel

Bottoming Chamfer

					Drill Bit			Bottoming Chamfer
Pipe Size	Thread Type	Threads Per Inch	Thread Lg.	Overall Lg.	Size	Decimal Size Equivalent	No. of Flutes		Each
1/8	BSPP	28	3/4"	2 5/32"	8.8 mm	0.3464"	3	0000000	000000
1/8	BSPT	28	3/4"	2 5/32"	8.8 mm	0.3464"	3	0000000	00000
1/4	BSPP	19	1 3/32"	2 7/16"	11.8 mm	0.4646"	3	0000000	00000
1/4	BSPT	19	1 3/32"	2 7/16"	11.8 mm	0.4646"	3	0000000	00000
3/8	BSPP	19	1 3/32"	2 9/16"	15.3 mm	0.6024"	3	0000000	00000
1/2	BSPP	14	1 3/8"	3 9/64"	19 mm	0.748"	3	0000000	00000

Taps for Helical Inserts

Plug Chamfer

Add threads to holes in preparation for installing helical inserts. These taps are made of uncoated high-speed steel and are for use on most metal and plastic. The square shank is compatible with tap wrenches and tap holders for drill presses and milling machines.

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.

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

Pipe Threads

For Insert					Drill Bit				Plug Chamfer
Pipe Size	Threads per Inch	Thread Lg.	Overall Lg.	Max. Tapping Dp.	Size	Decimal Size Equivalent	No. of Flutes	For Insert Thread Type		Each
Uncoated High-Speed Steel
1/8	28	1 1/2"	3 1/8"	1 1/2"	25/64"	0.3906"	4	BSPP	000000000	000000
1/4	19	1 5/8"	3 1/2"	1 5/8"	17/32"	0.5313"	4	BSPP	000000000	00000
3/8	19	1 7/8"	4"	1 7/8"	43/64''	0.6719"	4	BSPP	000000000	00000
1/2	14	2 1/4"	4 7/8"	2 1/4"	27/32"	0.8738"	4	BSPP	000000000	00000

Pipe and Conduit Tap Sets

Set with Fabric Pouch

Create pipe and conduit threads in a range of hole diameters. With a square shank, these taps are compatible with tap wrenches and tap holders for drill presses and milling machines.

Taps with NPT and BSPT threads have a plug chamfer for start-to-finish thread tapping.

Taps wth BSPP threads have a bottoming chamfer that 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.

Carbon steel taps are for thread repair and occasional tapping.

Uncoated Carbon Steel
No. of Pieces	Chamfer Type	Thread Type	Pipe Size	No. of Flutes	Container Type		Each
6	Plug	BSPT, Metric	1/8 1/4 3/8 1/2 3/4 1	4, 5	Fabric Pouch	00000000	0000000
6	Bottoming	BSPP, Metric	1/8 1/4 3/8 1/2 3/4 1	4, 5	Fabric Pouch	00000000	000000

Tap and Die Sets

Use a single set for many sizes of internal and external threads. The taps and dies are for use on most metal and plastic. Hex-shaped dies are for thread repair and can be used with conventional wrenches.

Carbon steel taps are for thread repair and occasional tapping.

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-chamfer taps. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.

Carbon Steel
No. of Pieces	Tap Sizes Included	Tap Chamfer Type	Die Shape	Die Sizes Included	Wd.	Container Type	Includes		Each
Right-Hand Thread
24	1/8"-28, M3 × 0.50 mm, M4 × 0.70 mm, M5 × 0.80 mm, M6 × 1.00 mm, M7 × 1.00 mm,; M8 × 1.25 mm, M9 × 1.25 mm, M10 × 1.50 mm, M12 × 1.50 mm, and M12 × 1.75 mm	Plug, Taper	Hex	1/8"-28, M3 × 0.50 mm, M4 × 0.70 mm, M5 × 0.80 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.25 mm, M9 × 1.25 mm, M10 × 1.50 mm, M12 × 1.50 mm, M12 × 1.75 mm	1"	Plastic Case	Die Wrench, Tap Wrench	00000000	000000
40	1/8"-28, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.00 mm,; M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, and M12 × 1.75 mm	Plug, Taper	Hex	1/8"-28, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, M12 × 1.75 mm	5/8", 1"	Plastic Case	Die Wrench (2), Tap Wrench (3), Thread Gauge	0000000	000000
50	1/8"-28, 1/4"-19, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm,; M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm,; M12 × 1.75 mm, M14 × 2.00 mm, M16 × 1.50 mm, M16 × 2.00 mm, M18 × 1.50 mm, and M18 × 2.50 mm	Plug, Taper	Hex	1/8"-28, 1/4"-19, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, M12 × 1.75 mm, M14 × 2.00 mm, M16 × 1.50 mm, M16 × 2.00 mm, M18 × 1.50 mm, M18 × 2.50 mm	1", 1 7/16"	Plastic Case	Die Wrench (2), Tap Wrench (3), Thread Gauge	0000000	000000
63	1/8"-28, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm,; M8 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm,; M12 × 1.50 mm, M12 × 1.75 mm, M14 × 1.50 mm, M14 × 2.00 mm, M16 × 1.50 mm, M16 × 2.00 mm,; M18 × 1.50 mm, M18 × 2.50 mm, M20 × 2.50 mm, M22 × 1.50 mm, M24 × 2.00 mm, and M24 × 3.00 mm	Plug, Taper	Hex	1/8"-28, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, M12 × 1.75 mm, M14 × 1.50 mm, M14 × 2.00 mm, M16 × 1.50 mm, M16 × 2.00 mm, M18 × 1.50 mm, M18 × 2.50 mm, M20 × 2.50 mm, M22 × 1.50 mm, M24 × 2.00 mm, M24 × 3.00 mm	5/8", 1", 1 3/16", 1 7/16", 1 13/16"	Plastic Case	Die Wrench (4), Tap Wrench (4), Thread Gauge	0000000	000000

Tap, Die, and Drill Bit Sets

Cut and repair threads and drill holes in many different sizes. Tap and die wrenches are included. The dies are hex shaped for use with conventional wrenches. The taps are made of carbon steel and are recommended for thread repair and occasional tapping.

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.

Carbon Steel
No. of Pieces	Tap Sizes Included	Die Sizes Included	Drill Bit Sizes Included	Container Type	Includes		Each
Right-Hand Thread
117	4-40, 6-32, 8-32, 10-24, 10-32, 12-24,; 1/8"-27, 1/8"-28, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24,; 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20,; M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm,; M7 × 1.00 mm, M8 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm,; M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, and M12 × 1.75 mm	4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/8"-27, 1/8"-28, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 x 1.25 mm, M10 × 1.50 mm, M10 x 1.50 mm, M11 × 1.50 mm, M11 x 1.50 mm, M12 × 1.50 mm, M12 x 1.50 mm, M12 × 1.75 mm	5/64", 7/64", 5/32", 1/4", 19/64", 5/16", 21/64", 3/8", 25/64", 13/32", 27/64", 29/64",; 43 ga., 39 ga., 36 ga., 30 ga., 29 ga., 25 ga., 21 ga., 20 ga., 16 ga., 9 ga., 7 ga., 3 ga., B, F, H, I, J, O, Q, R, S, U, and Z	Plastic Case	Die Wrench (2), Extractor (5), Tap Wrench (3), Thread Gauge (2)	00000000	0000000