M12 Tee Nuts | McMaster-Carr

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37 Products

T-Slot Nuts

Slide into T-slot tracks on machine tool tables to secure clamps and workpieces. These nuts are often paired with setup studs for adjustable fixtures.

Metric

Image of Product. Front orientation. Contains Annotated. T-Slot Nuts.

Black-Oxide Steel—Create a finished look with a dark, matte coating. These nuts offer minimal corrosion resistance, so they're best for dry environments.

18-8 Stainless Steel—Stainless steel nuts have excellent corrosion resistance. They are a good choice for use with stainless steel parts or in EDM applications.

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

Partially Threaded—Partially threaded nuts keep studs from traveling past the bottom of the nut and damaging your table.

DIN 508—Nuts meet DIN dimensional and material requirements. Slide them into DIN 650 T-slots.

			Base, mm					Fully Threaded		Partially Threaded
	For Slot Wd., mm	Thread Size	Lg.	Wd.	Ht.	Overall Ht., mm	Specs. Met		Each		Each
Black-Oxide Steel



		14	M12 × 1.75 mm	22	22	8	16	DIN 508	90510A114	00000	———	0


		14	M12 × 1.75 mm	29	22	9	16	—	90510A216	0000	90974A117	00000
		16	M12 × 1.75 mm	29	25	9	16	—	90510A217	0000	90974A119	0000
		17	M12 × 1.75 mm	32	29	11	19	—	90510A218	0000	90974A120	0000
		18	M12 × 1.75 mm	28	28	10	20	—	90510A234	0000	———	0
		20	M12 × 1.75 mm	32	32	12	24	—	90510A319	00000	———	0


		18-8 Stainless Steel



				14	M12 × 1.75 mm	22	22	8	16	DIN 508	90510A246	00000	———	0

Tee-Nut Threaded Inserts for Wood

A four-pronged flange resists twisting in hardwood and softwood. These inserts are good for light duty assemblies that don't need the precise fit of tapping inserts. Hammer them into a drilled hole to install. The installed length includes the flange.

Zinc-Plated Steel—A step up from plain steel, the plating withstands occasional exposure to moisture.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

			Barrel, mm		Flange, mm
	Thread Size	Installed Lg., mm	Dia.	Lg.	Dia.	Thick.	Drill Bit Size, mm	For Max. Hole Dia., mm	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		M12 x 1.75 mm	12	15	11	32	2	15	15	5	98965A104	00000


		M12 x 1.75 mm	14	13.5	12.4	27	1.6	13.75	13.75	50	98965A101	00000


		18-8 Stainless Steel



				M12 x 1.75 mm	13	14.5	11	27	2	14.75	14.75	1	94904A201	0000

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 Metric Threads

Image of Product. Front orientation. Contains Annotated. Lathe Chuck Jaw Nuts.

M12 Threads—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.

			Base
For Lathe Chuck Dia.	For Slot Wd.	Thread Size	Ht.	Lg.	Wd.	Overall Ht.	For Serration Size	Mounting Hole Ctr.-to-Ctr.	Material		Each
8"	0.551"	M12 × 1.75 mm	11/32"	1 27/32"	13/16"	13/16"	1.5 mm × 60°	0.984"	Steel	3228N12	000000
10"	0.63"	M12 × 1.75 mm	11/32"	1 63/64"	7/8"	27/32"	1.5 mm × 60°	1.181"	Steel	3228N13	00000

Strong-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.

Metric

Black-Oxide Steel—Create a finished look with a dark, matte coating. These nuts offer minimal corrosion resistance, so they're best for dry environments.

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

			Base, mm				Drive			Fully Threaded
	For Slot Wd., mm	Thread Size	Lg.	Wd.	Ht.	Overall Ht., mm	Size, mm	Style	Includes		Each
Black-Oxide Steel



		16	M12 × 1.75 mm	30.9	25.4	9.2	22.2	5	Hex	Set Screw	84865A774	000000


		18	M12 × 1.75 mm	34.7	28.6	10.5	28.6	6	Hex	Set Screw	84865A78	00000

Drop-In T-Slot Nuts

Mount clamps and other fixtures to machine tool tables anywhere along the length of your T-slot track. These nuts install from the top and secure with a quarter turn, so you don’t have to slide them down the track’s length. They’re often paired with setup studs for adjustable fixtures. Also known as quarter-turn T-slot nuts.

Metric

Black-Oxide Steel—Create a finished look with a dark, matte coating. These nuts offer minimal corrosion resistance, so they're best for dry environments.

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

			Base, mm				Fully Threaded
	For Slot Wd., mm	Thread Size	Lg.	Wd.	Ht.	Overall Ht., mm		Each
Black-Oxide Steel



		14	M12 × 1.75 mm	22	13.6	8	16	90799A214	00000

Low-Profile Rectangular Weld Nuts

Weld permanent threads in channels and other tight spaces without adding a barrel bump that gets in the way. These nuts have a short barrel that tucks under low surfaces and a slim footprint that fits between narrow channel walls.

Steel—Best for dry environments since moisture will cause them to rust. Made of uncoated steel, these nuts require minimal prep. Weld them to uncoated steel surfaces.

Number of Projections—More projections lead to more consistent welds by concentrating heat and protecting the threads from deforming.

			Base, mm			Barrel, mm
	Thread Size	No. of Projections	Lg.	Wd.	Thk.	Dia.	Ht.	For Hole Dia., mm	Pkg. Qty.		Pkg.
Steel



		M12 × 1.75 mm	0	38	19.4	4.8	14.1	2.4	14.7	5	98001A102	000000


		M12 × 1.75 mm	2	28.5	19	4.8	14	2.4	14	10	92006A230	00000

T-Slot Fastener 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., mm	No. of Pieces	Includes	Threading	Base Ht., mm	Base Wd., mm	Overall Ht., mm	Threading	Min. Tensile Strength, psi	Material		Each
M12 × 1.75 mm



		14	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	9	22	16	Threaded on Both Ends	125,000	Black-Oxide Steel	3396A35	0000000


		16	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	9	25	16	Threaded on Both Ends	125,000	Black-Oxide Steel	3396A36	000000
		17	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	11	29	19	Threaded on Both Ends	125,000	Black-Oxide Steel	3396A37	000000

Stainless Steel Closed-End Adhesive-Ready Nuts

Top View

Bottom View

Adhere or mold these nuts onto a surface without gunking up the threads—the closed end blocks out adhesive, resin, and debris. It also acts as a stop, preventing screws from penetrating your material. Use them to add strong threads to material that’s too difficult and brittle to drill, such as acrylic and carbon fiber. They’re also often used when the surface is too thin to grip a threaded insert. To create a secure bond, large holes in the base let adhesive and resin flow and spread along the joint. Made of 316 stainless steel, these nuts resist corrosion from salt water and harsh chemicals.

The base of these nuts acts like a flange, distributing pressure evenly across the mounting surface. The larger the base, the more that pressure is spread out; the smaller the base, the tighter the space these nuts can fit into. Taller nuts engage more of a screw’s threads than shorter nuts. Shorter nuts fit in low-clearance areas.

		Base, mm		Nut, mm
	Thread Size	Dia.	Thk.	Wd.	Ht.	Hole Dia., mm	Pkg. Qty.		Pkg.
316 Stainless Steel



		M12 × 1.75 mm	38	1.2	13	12.7	4, 5	1	93553A470	00000


		M12 × 1.75 mm	38	1.2	19	8	4, 5	5	93553A280	00000

Setup Clamp and T-Slot Fastener Kits

Metal Wall-Mount Rack

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, mm
	For Slot Wd., mm	No. of Pieces	Includes	Ht. Range	Wd.	T-Slot Nut Base Wd., mm	Material	Container Type		Each
M12 × 1.75 mm



		14	53	4 Coupling Nuts 3 Step Block Pairs 6 Flange Nuts 6 Step Setup Clamps (2 each in 64 mm, 102 mm, and 152 mm lengths) 6 T-Slot Nuts 24 Studs (4 each in 80 mm, 110 mm, 125 mm, 150 mm, 175 mm, and 200 mm lengths) T-Slot Cleaner	19 to 152	25	22	Steel	Metal Wall-Mount Rack	8957A72	0000000


		16	53	4 Coupling Nuts 3 Step Block Pairs 6 Flange Nuts 6 Step Setup Clamps (2 each in 64 mm, 102 mm, and 152 mm lengths) 6 T-Slot Nuts 24 Studs (4 each in 80 mm, 110 mm, 125 mm, 150 mm, 175 mm, and 200 mm lengths) T-Slot Cleaner	19 to 152	25	25	Steel	Metal Wall-Mount Rack	8957A81	000000

Stainless Steel Adhesive-Ready Nuts

Add strong threads to material that’s too difficult to drill or too thin to grip a threaded insert. These nuts are ideal for brittle plastics or tough composites, such as acrylic or carbon fiber. They have large holes in the base so that adhesive or resin can flow through, spread out, and create an extra-strong hold. You can also mold them into the surface of your material. Made of 316 stainless steel, they resist corrosion from salt water and harsh chemicals.

		Base, mm		Nut, mm
	Thread Size	Dia.	Thk.	Wd.	Ht.	Hole Dia., mm	Pkg. Qty.		Pkg.
316 Stainless Steel



		M12 × 1.75 mm	38	1.2	13	12.7	4, 5	1	98007A491	00000


		M12 × 1.75 mm	38	1.2	19	8	4, 5	5	98007A458	00000

Weld Locknuts

Prevent screws from backing out under heavy vibration. These nuts have distorted threads that grip screws tightly. Three evenly spaced projections concentrate heat away from the threads to prevent them from deforming and create consistent welds. These nuts also have a collar pilot that guides the nut into the hole, holds it in place while welding, and protects the threads from weld spatter.

Use Grade 2 or Class 6 screws to avoid stripping threads during installation. Distorted threads require high torque for fastening and unfastening, so you may need an impact wrench to remove screws.

Steel—Best for dry environments since moisture will cause them to rust. Made of uncoated steel, these nuts require minimal prep. Weld them to uncoated steel surfaces.

				Collar, mm
	Thread Size	Wd., mm	Ht., mm	Dia.	Ht.	For Hole Dia., mm	Pkg. Qty.		Pkg.
Steel



		M12 × 1.75 mm	20.6	9.4	15.9	1.26	15.9	50	90744A340	000000


		M12 × 1.75 mm	21	9.7	16.1	1.8	16.1	10	90744A160	0000

Self-Aligning Rectangular Weld Nuts

Help screws pass through perfectly every time. These nuts float inside a rectangular retainer that shifts and tilts to compensate for misalignment. A pilot tip locates the hole, and the retainer holds the nut in place during welding.

Steel with Steel Retainer—Best for dry environments since moisture will create rust. Weld them to steel surfaces.

		Base, mm
	Thread Size	Lg.	Wd.	Thk.	Ht., mm	Pkg. Qty.		Pkg.
Steel with Steel Retainer



		M12 × 1.75 mm	58.7	23.8	1.27	20.2	5	90955A313	000000

Weld Nuts

Add permanent threads to thin metal with our go-to weld nuts. Unlike press-fit and rivet nuts, these nuts fuse to the base metal, so they won’t twist and pull out. Three evenly spaced projections concentrate heat away from the threads to prevent them from deforming and create consistent welds. All have a collar pilot that guides the nut into the hole, holds it in place while welding, and protects the threads from weld spatter. You can also install them on thick pieces of metal.

Steel—Best for dry environments since moisture will cause them to rust. Made of uncoated steel, these nuts require minimal prep. Weld them to uncoated steel surfaces.

18-8 Stainless Steel—Suitable for outdoor use, these nuts resist rust from water and mild chemicals. Weld them to stainless steel surfaces.

				Collar, mm
	Thread Size	Wd., mm	Ht., mm	Dia.	Ht.	For Hole Dia., mm	Specs. Met	Pkg. Qty.		Pkg.
Steel



		M12 × 1.75 mm	19	8.6	14.8	1.4	14.8	DIN 929	25	93337A700	000000


		18-8 Stainless Steel



				M12 × 1.75 mm	19	8.6	14.8	1.4	14.8	DIN 929	10	93418A800	00000

Extra-Long T-Slot Nuts

T-Slot Nut and Extra-Long

T-Slot Nut Shown Installed

Within Cross-Slot

Image of Product. Front orientation. Contains Annotated. T-Slot Nuts. Extra-Long T-Slot Nuts.

With an extra-long base, these nuts carry heavier loads and grip T-slot tracks more securely than standard nuts. Use them to anchor clamps and workpieces to machine tool tables. They’re often paired with setup studs for adjustable fixtures.

Metric

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

DIN 508—Nuts meet DIN dimensional and material requirements. Slide them into DIN 650 T-slots.

			Base, mm					Fully Threaded
	For Slot Wd., mm	Thread Size	Lg.	Wd.	Ht.	Overall Ht., mm	Specs. Met		Each
Steel



		14	M12 × 1.75 mm	44	22	8	16	DIN 508	90894A171	00000

Spring-Loaded T-Slot Nuts

Prevent clamps and other fixtures from accidentally shifting along your machine tool table. These nuts have a spring-loaded ball to hold them firmly inside T-slot tracks but still slide if you need to reposition them. They’re often paired with setup studs for adjustable fixtures.

Metric

Image of Product. Bottom orientation. Contains Annotated. T-Slot Nuts. Spring-Loaded T-Slot Nuts.

Black-Oxide Steel—Create a finished look with a dark, matte coating. These nuts offer minimal corrosion resistance, so they're best for dry environments.

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

DIN 508—Nuts meet DIN dimensional and material requirements. Slide them into DIN 650 T-slots.

			Base, mm					Fully Threaded
	For Slot Wd., mm	Thread Size	Lg.	Wd.	Ht.	Overall Ht., mm	Specs. Met		Each
Black-Oxide Steel



		14	M12 × 1.75 mm	22	22	8	16	DIN 508	97734A113	000000

Square Weld Nuts

With four symmetrical projections, these nuts create the strongest hold in our offering. Unlike rectangular weld nuts, each projection is equidistant from the threads, so welds wrap evenly for extra strength and twist resistance. Projections concentrate heat away from the threads to prevent them from deforming and create consistent welds. All nuts have a collar pilot that guides them into the hole, holds them in place while welding, and protects the threads from weld spatter.

Steel—Best for dry environments since moisture will cause them to rust. Made of uncoated steel, these nuts require minimal prep. Weld them to uncoated steel surfaces.

	Wd., mm	Ht., mm	For Hole Dia., mm	Specs. Met	Pkg. Qty.		Pkg.
Steel



	M12 × 1.75 mm	19	9.5	13	DIN 928	25	93975A760	000000