M2 Pins | McMaster-Carr

Filter by

System of Measurement

Diameter

Handle Material

End Type

Lock Release

Material

Fastener Head Type

Performance

Usable Length

Pin Type

Number of Retaining Balls

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Finish

REACH

RoHS

Hardness

Export Control Classification Number (ECCN)

EAR99

For Use With

Blind Holes

Color

Black

Double Shear Breaking Strength

Not Rated

Handle Color

Black

Mounting Flange Diameter

25 mm

Mounting Hole Thread Pitch

0.4 mm

Mounting Hole Thread Size

Forward

How can we improve?

8 Products

Quick-Release Pins for Blind Holes

Often used to position and hold parts during assembly and inspection, mate these pins with a receptacle to secure them in blind holes. Install the receptacle (sold separately) in the hole so you can insert the pin to join components. Three retaining balls lock pins in place until released.

Twist Knob

No button to hold down, these pins secure and release with just a quarter turn of the knob.

Nickel-Plated Carbon Steel—With a durable finish, these pins resist rust, salt water, and mild chemicals.

	Quick-Release Pins												Receptacles
	Dia., mm	Usable Lg., mm	For Panel Thk., mm	Mounting Flange Dia., mm	Double Shear Breaking Strength	Min. Hardness	Handle Color	Handle Material	Ball Material	Mounting Fasteners Included		Each		Each
Nickel-Plated Carbon Steel



		6	10.5	6 to 10	25	Not Rated	Not Rated	Black	Plastic	Stainless Steel	Yes	97580A311	000000	99802A211	000000

Threaded Plug Gauges

Test if internal threads fall within tolerance. These plug gauges are often used in nuts and tapped holes to confirm thread fit. For precision and accuracy, they’re manufactured to tight tolerances.

Threads are within tolerance if it’s easy to thread a go gauge but difficult to thread a no-go gauge more than two turns.

Class X Gauge

Go Gauge—Go gauges check the minimum hole diameter.

No-Go Gauge—No-go gauges check the maximum hole diameter.

Accuracy Certificate Traceable to NIST—Gauges with an accuracy certificate traceable to NIST include verification from the manufacturer that their thread sizes are within tolerance. The certificate is also known as a certificate of compliance or a short-form certification.

For Metric Class 6H Thread Fit—For metric threads, the higher the class number, the looser the fit. Class 6H is the metric standard and works for most applications.

For Thread Fit—Thread fit designates the tightness or looseness of mating threads.

	Thread Type	Pitch Dia. Tolerance	Hardness	Material	For Thread Fit		Each
Go Gauges



	M2 × 0.4 mm	Metric	0" to 0.0002"	Rockwell C70	Chrome-Plated Tool Steel	Metric Class 6H	7968N34	000000


	Go Gauges with Accuracy Certificate Traceable to NIST



			M2 × 0.4 mm	Metric	0" to 0.0002"	Rockwell C70	Chrome-Plated Tool Steel	Metric Class 6H	7968N124	00000


			No-Go Gauges



					M2 × 0.4 mm	Metric	-0.0002" to 0"	Rockwell C70	Chrome-Plated Tool Steel	Metric Class 6H	7968N78	00000


					No-Go Gauges with Accuracy Certificate Traceable to NIST



							M2 × 0.4 mm	Metric	-0.0002" to 0"	Rockwell C70	Chrome-Plated Tool Steel	Metric Class 6H	7968N168	00000

Go/No-Go Threaded Plug Gauges with Handle

Speed up thread tolerance checks—the handle on these gauges gives you a good grip to quickly thread and unthread go or no-go gauges. Use these gauges to make sure nuts, tapped holes, and other parts fall within tolerance. All are precisely manufactured to confirm thread fit. If the plug gauges wear down, you can insert new ones (not included) onto the taperlock handle.

A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.

Go/no-go gauges have both a go gauge on one end of the handle and a no-go gauge on the other to speed up tests. Go gauges check the minimum internal thread size. No-go gauges check the maximum internal thread size.

Class X Gauge

Double-Ended Taperlock

Handle

Calibration Certificate Traceable to NIST—Gauges with a calibration certificate traceable to NIST were calibrated in a lab. The certificate, sometimes called a test report or long-form certificate, details the tested measurements.

For Metric Class 6H Thread Fit—These metric-threaded gauges are class 6H, which is comparable to the fit of those with Class 2B Unified Standard.

For Thread Fit—Thread fit designates the tightness or looseness of mating threads.

	Thread Type	Pitch Dia. Tolerance, mm	Hardness	Material	Features	For Thread Fit		Each
Go/No-Go Gauges



	M2 × 0.4 mm	Metric	-0.005 to 0.005	Rockwell C70	Chrome-Plated Tool Steel	Double-Ended Taperlock Handle	Metric Class 6H	23585A107	0000000


	Go/No-Go Gauges with Calibration Certificate Traceable to NIST



			M2 × 0.4 mm	Metric	-0.005 to 0.005	Rockwell C70	Chrome-Plated Tool Steel	Double-Ended Taperlock Handle	Metric Class 6H	3206A113	000000