2 1/2 NPT Taps | McMaster-Carr

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	Thread Type Thread Type	Show

NPT

	Thread Type Thread Type	Hide

NPT

NPTF

	Pipe Size Pipe Size	Show

2 1/2

	Pipe Size Pipe Size	Hide

	For Use On For Use On

	Chamfer Type Chamfer Type

Plug

Bottoming

	Material Material

High-Speed Steel

Steel

	Application Application

Through-Hole Threading

Closed-End Hole Threading

	Threads Per Inch Threads Per Inch

	Thread Direction Thread Direction

Right Hand

	Flute Type Flute Type

	Straight

	Drill Bit Size Drill Bit Size

2 39/64"

2 5/8"

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Drill Bit Decimal Size Equivalent Drill Bit Decimal Size Equivalent

2.6094"

2.625"

	Maximum Tapping Depth Maximum Tapping Depth

2 9/16"

2 3/4"

	Number of Tapping Ends Number of Tapping Ends

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

REACH Compliant

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

RoHS Compliant

	Thread Length Thread Length

2 9/16"

2 3/4"

	Number of Flutes Number of Flutes

	Shank Type Shank Type

	Square

	Pitch Diameter Limit Pitch Diameter Limit

Not Rated

	Overall Length Overall Length

5 1/2"

	Finish Finish

Uncoated

	Individual/Set Individual/Set

Individual

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2 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. 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.

NPT and NPTF

					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
2 1/2	NPT	8	2 9/16"	5 1/2"	2 39/64"	2.6094"	7	00000000	0000000

Economy Carbon Steel Pipe and Conduit Thread Taps

Use these carbon steel taps for thread repair and occasional tapping of pipe and conduit. They can tap threads into most metal and plastic, but they have a shorter tool life than standard taps. 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.

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

					Drill Bit			Plug Chamfer
Pipe Size	Thread Type	Threads Per Inch	Thread Lg.	Overall Lg.	Size	Decimal Size Equivalent	No. of Flutes		Each
Uncoated Carbon Steel
2 1/2	NPT	8	2 3/4"	5 1/2"	2 5/8"	2.625"	8	000000000	0000000