M12 Tee Nuts | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	Thread Size Thread Size	Show

M12

	Thread Size Thread Size	Hide

	Thread Pitch Thread Pitch

1.75 mm

	For Slot Width For Slot Width

	Base Width Base Width

	Material Material

Steel

Stainless Steel

	Finish Finish

Black Oxide

	Threading Threading

Fully Threaded

Partially Threaded

	Base Height Base Height

	Overall Height Overall Height

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Thread Fit Thread Fit

Class 6G

Class 6H

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

REACH Compliant

	For Lathe Chuck Diameter For Lathe Chuck Diameter

10"

	Specifications Met Specifications Met

DIN 508

DIN 928

DIN 929

	Weld Nut Shape Weld Nut Shape

	Square
	Hex

	Nut Type Nut Type


Weld	Square

Hex

	Height Height

8.1mm

8.6 mm

	Mounting Hole Center-to-Center Mounting Hole Center-to-Center

0.984"

1.181"

	T-Slot Nut Base Width T-Slot Nut Base Width

22mm

25mm

29mm

	For Hole Diameter For Hole Diameter

14.8 mm

17.4mm

	For Serration Size For Serration Size

1.5 mm × 60°

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22 Products

About Nuts, Materials, and Finishes

Square Weld Nuts

Square weld nuts have more weld points than hex weld nuts for a stronger hold. Weld them on flat uncoated steel surfaces. All have a collar pilot that assists alignment and prevents welding spatter from getting into threads.

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

Metric

Thread
Size	Pitch, mm	Wd., mm	Ht., mm	For Hole Dia., mm	Specifications Met	Pkg. Qty.		Pkg.
Steel
M12	1.75	19	8.1	17.4	DIN 928	25	000000000	000000

Metric Steel Hex Weld Nuts

You can weld these nuts to flat and uneven uncoated steel surfaces for a strong permanent hold. A collar pilot assists alignment and prevents welding spatter from getting into threads.

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

Thread				Collar
Size	Pitch, mm	Wd., mm	Ht., mm	Dia., mm	Ht., mm	For Hole Dia., mm	Specifications Met	Pkg. Qty.		Pkg.
Steel
M12	1.75	19	8.6	14.8	1.4	14.8	DIN 929	25	000000000	000000

Metric Stainless Steel Hex Weld Nuts

You can weld these nuts to flat and uneven uncoated stainless steel surfaces for a strong permanent hold. They have a collar pilot that assists alignment and prevents welding spatter from getting into threads.

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

Thread				Collar
Size	Pitch, mm	Wd., mm	Ht., mm	Dia., mm	Ht., mm	For Hole Dia., mm	Specifications Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel
M12	1.75	19	8.6	14.8	1.4	14.8	DIN 929	10	000000000	000000

T-Slot Nuts

Designed to slide into T-slot tracks on machine tool tables, use these nuts to secure clamps and workpieces.

Fully threaded nuts allow a stud to extend beyond the bottom of the nut. Partially threaded nuts keep studs from traveling past the bottom of the nut and damaging your table.

Stainless steel nuts have excellent corrosion resistance. They are a good choice for use with stainless steel parts or in EDM applications.

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

Metric

			Base				Fully Threaded		Partially Threaded
Thread Size	Thread Pitch, mm	For Slot Wd., mm	Ht., mm	Wd., mm	O'all Ht., mm	Specifications Met		Each		Each
Black-Oxide Steel
M12	1.75	14	9	22	16	__	000000000	00000	000000000	00000
M12	1.75	16	9	25	16	__	000000000	0000	000000000	0000
M12	1.75	17	11	29	19	__	000000000	0000	000000000	0000
M12	1.75	18	10	28	20	DIN 508	000000000	0000	000000	00
M12	1.75	20	12	32	24	DIN 508	000000000	00000	000000	00
18-8 Stainless Steel
M12	1.75	14	8	22	16	DIN 508	000000000	0000	000000	00

Drop-In T-Slot Nuts

Install these nuts from the top of the T-slot track and secure with a quarter turn to anchor clamps and workpieces. Also known as quarter-turn T-slot nuts.

Fully threaded nuts allow a stud to extend beyond the bottom of the nut.

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

Metric

Thread			Base			Fully Threaded
Size	Pitch, mm	For Slot Wd., mm	Ht., mm	Wd., mm	O'all Ht., mm		Each
Black-Oxide Steel
M12	1.75	14	8	22	16	000000000	00000

Secure-Hold T-Slot Nuts

After sliding the nut into a T-slot track, tighten the set screw to keep it in place. Use these nuts to secure clamps and workpieces in a machine table. They’re fully threaded to allow a stud to extend beyond the bottom of the nut.

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

Metric

Thread			Base			Drive			Fully Threaded
Size	Pitch, mm	For Slot Wd., mm	Ht., mm	Wd., mm	O'all Ht., mm	Size, mm	Style	Includes		Each
Black-Oxide Steel
M12	1.75	16	9.2	25.4	22.2	5	Hex	Set Screw	000000000	000000
M12	1.75	18	10.5	28.6	28.6	6	Hex	Set Screw	00000000	00000

T-Slot Nut and Setup Stud Kits

For mounting items to your machine table, these kits contain the full system of necessary components. Choose the kit with slot width matching that of your table.

Each kit includes T-slot nuts, setup studs, flange nuts, coupling nuts, and a T-slot cleaning tool.

			T-Slot Nut				Setup Stud
For Slot Wd.	No. of Pieces	Includes	Threading	Base Ht.	Base Wd.	Overall Ht.	Threading	Min.Tensile Strength, psi	Material		Each
M12 Thread Size × 1.75mm Thread Pitch
14mm	37	4 T-Slot Nuts 4 Setup Studs each in 80 mm, 110 mm, 140 mm, 150 mm, 175 mm, and 200 mm Lengths 4 Flange Nuts 4 Coupling Nuts 1 T-Slot Cleaner	Partially Threaded	9mm	22mm	16mm	Threaded on Both Ends	125,000	Black-Oxide Steel	0000000	0000000
16mm	37	4 T-Slot Nuts 4 Setup Studs each in 80 mm, 110 mm, 140 mm, 150 mm, 175 mm, and 200 mm Lengths 4 Flange Nuts 4 Coupling Nuts 1 T-Slot Cleaner	Partially Threaded	9mm	25mm	16mm	Threaded on Both Ends	125,000	Black-Oxide Steel	0000000	000000
17mm	37	4 T-Slot Nuts 4 Setup Studs each in 80 mm, 110 mm, 140 mm, 150 mm, 175 mm, and 200 mm Lengths 4 Flange Nuts 4 Coupling Nuts 1 T-Slot Cleaner	Partially Threaded	11mm	29mm	19mm	Threaded on Both Ends	125,000	Black-Oxide Steel	0000000	000000

Setup Clamp and T-Slot Fastener Kits

Wall-Mount Steel Holder

Get everything needed for basic workholding on a machine table. Select a kit that matches your table's slot width. Each kit includes studs, setup clamps, step blocks, T-slot nuts, flange nuts, coupling nuts, and a T-slot cleaning tool.

			Step Block
For Slot Wd., mm	No. of Pieces	Includes	Ht. Range, mm	Wd., mm	T-Slot Nut Base Wd., mm	Material	Container Type		Each
M12 × 1.75 mm Thread Size
14	53	24 Studs (4 each in 80 mm, 110 mm, 125 mm, 150 mm, 175 mm, and 200 mm lengths) 6 Step Setup Clamps (2 each in 64 mm, 102 mm, and 152 mm lengths) 3 Step Block Pairs 6 T-Slot Nuts 6 Flange Nuts 4 Coupling Nuts T-Slot Cleaner	19-152	25	22	Steel	Wall-Mount Steel Holder	0000000	0000000
16	49	24 Studs (4 each in 80 mm, 110 mm, 125 mm, 150 mm, 175 mm, and 200 mm lengths) 6 Step Setup Clamps (2 each in 64 mm, 102 mm, and 152 mm lengths) 3 Step Block Pairs 6 T-Slot Nuts 6 Flange Nuts 4 Coupling Nuts T-Slot Cleaner	19-152	25	25	Steel	Wall-Mount Steel Holder	0000000	000000

Lathe Chuck Jaw Nuts

Secure jaws to a CNC lathe chuck with industry standard 1.5 mm × 60° serrations or wider 3 mm × 60° serrations.

Jaw nuts with M6, M8, M10, M12, M16, and M20 threads fit most chucks made by Kitagawa, LMC, Samchully, Seoam, Auto Strong, and other brands.

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

Jaw Nuts with Metric Threads

		Thread		Base
For Lathe Chuck Dia.	For Slot Wd.	Size	Pitch, mm	Ht.	Lg.	Wd.	Overall Ht.	For Serration Size	Mounting Hole Ctr.-to-Ctr.	Material		Each
8"	0.551"	M12	1.75	11/32"	1 27/32"	13/16"	13/16"	1.5 mm × 60°	0.984"	Steel	0000000	000000
10"	0.63"	M12	1.75	11/32"	1 63/64"	7/8"	27/32"	1.5 mm × 60°	1.181"	Steel	0000000	00000