M4 Tee Nuts | McMaster-Carr

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57 Products

T-Slotted Framing Fasteners

Secure brackets and other accessories to rails.

End-Feed Nuts

Self-Aligning Nut

Spring-Tab

Nut

Self-Aligning

Nut

Spring-Tab

Nut

End-feed nuts slide into the end of the rail to attach components.

Self-Aligning Nut—A ridge keeps these nuts centered in the T-slot.

Spring-Tab Nut—A flexible tab on the side holds these nuts in place and compensates for different slot depths.

	For Rail Ht.
	Single	Double and Quad	Triple	Mounting Hole Location	Thread Size	Thk.	Color	Material	Pkg. Qty.		Pkg.
Self-Aligning Nut



		1", 25 mm	2", 50 mm	3"	Center	M4	0.177"	Silver	Zinc-Plated Steel	4	5278N51	00000


		1 1/2", 30 mm, 40 mm	3", 60 mm, 80 mm	4 1/2", 120 mm	Center	M4	0.236"	Silver	Zinc-Plated Steel	4	6000N201	0000


		Spring-Tab Nut



				1 1/2", 40 mm	3", 80 mm	4 1/2", 120 mm	Center	M4	0.236"	Silver	Zinc-Plated Steel	4	4976N45	00000

Drop-In Nuts


Self-Aligning Nut	Spring-Tab Nut	Self-Aligning Spring-Tab Nut

Self-Aligning Spring-Loaded Ball Nut	Hammer Nut	Offset Mounting Hole


Self-Aligning Nut	Spring-Tab Nut	Self-Aligning Spring-Tab Nut	Self-Aligning Spring-Loaded Ball Nut	Hammer Nut

Drop-in nuts fit directly into the T-slot to attach components—no need to disassemble your existing structure.

Self-Aligning Nut—A ridge keeps these nuts centered in the T-slot.

Spring-Tab Nut—A flexible tab on the side holds these nuts in place and compensates for different slot depths.

Self-Aligning Spring-Tab Nut—A ridge keeps these nuts centered in the T-slot, and a flexible tab holds them in place. The tab also compensates for different slot depths.

Self-Aligning Spring-Loaded Ball Nut—A ridge keeps these nuts centered in the T-slot, and a spring-loaded ball keeps them in place. The ball also glides over holes, so they're easy to reposition.

Hammer Nut—Drop into the slot and turn into place as you tighten the screw.

Offset Mounting Hole—A mounting hole close to one end, so you can install these nuts next to corners and rail ends.

Static Dissipative—Serrations pierce the anodized coating of the rail to dissipate static charges and protect sensitive electronic equipment.

	For Rail Ht.
	Single	Double and Quad	Triple	Mounting Hole Location	Thread Size	Thk.	Color	Material	Static Control Rating	Pkg. Qty.		Pkg.
Self-Aligning Nut



		1 1/2", 30 mm, 40 mm	3", 60 mm, 80 mm	4 1/2", 120 mm	Center	M4	0.189"	Silver	Zinc-Plated Steel	—	4	5021N29	000000


		45 mm	90 mm	—	Center	M4	0.205"	Silver	Zinc-Plated Steel	—	4	5278N27	0000


		Spring-Tab Nut



				1 1/2", 40 mm	3", 80 mm	4 1/2", 120 mm	Center	M4	0.236"	Silver	Zinc-Plated Steel	—	4	5508N13	0000


				Self-Aligning Spring-Tab Nut



						1 1/2", 30 mm, 40 mm	3", 60 mm, 80 mm	4 1/2", 90 mm, 120 mm	Center	M4	0.181"	Silver	Zinc-Plated Steel	—	4	5278N45	0000


						1 1/2", 40 mm	3", 80 mm	4 1/2", 120 mm	Center	M4	0.283"	Silver	Zinc-Plated Steel	—	4	6000N205	0000
						45 mm	90 mm	—	Center	M4	0.205"	Silver	Zinc-Plated Steel	—	4	5278N28	0000


						Self-Aligning Spring-Loaded Ball Nut



								1 1/2", 40 mm	3", 80 mm	4 1/2", 120 mm	Offset	M4	0.283"	Silver	Zinc-Plated Steel	—	4	5278N12	0000


								20 mm	40 mm	—	Offset	M4	0.181"	Silver	Zinc-Plated Steel	—	4	5278N43	0000


								Hammer Nut



										1", 25 mm	2", 50 mm	3"	Center	M4	0.165"	Silver	304 Stainless Steel	Static Dissipative	4	6000N21	0000


										1", 25 mm	2", 50 mm	3"	Center	M4	0.165"	Silver	Zinc-Plated Steel	Static Dissipative	4	6000N209	0000
										1 1/2", 30 mm, 40 mm	3", 60 mm, 80 mm	4 1/2", 120 mm	Center	M4	0.236"	Silver	Zinc-Plated Steel	Static Dissipative	4	6000N216	0000
										1 1/2", 40 mm	3", 80 mm	4 1/2", 120 mm	Center	M4	0.295"	Silver	Zinc-Plated Steel	Static Dissipative	4	5812N11	0000
										45 mm	90 mm	—	Center	M4	0.346"	Silver	Zinc-Plated Steel	Static Dissipative	4	6000N22	0000

Drop-In Screw and Nut Sets


	Self-Aligning Spring-Tab Nut with Button Head	Hammer Nut with Button Head	Hammer Nut with Flanged Button Head


Self-Aligning Spring-Tab Nut	Hammer Nut

With compatible screws included, the nuts in these sets fit directly into the T-slot to attach components—no need to disassemble your existing structure.

Self-Aligning Spring-Tab Nut with Button Head Fastener—A ridge keeps these nuts centered in the T-slot, and a flexible tab holds them in place. The tab also compensates for different slot depths. Their screws have a compact button head to fit into tight spaces.

Hammer Nut with Button Head Fastener—Drop these nuts into the slot and turn them into place as you tighten the screw. They have compact button head screws, so they fit into tight spaces.

Hammer Nut with Flanged Button Head Fastener—No need for washers on oversized mounting holes—these nuts include screws with a wide flange. Drop these nuts into the slot and turn them into place as you tighten the screw.

	For Rail Ht.				Thread		Screw		Nut
	Single	Double and Quad	Triple	Mounting Hole Location	Size	Lg., mm	Color	Material	Color	Material	Pkg. Qty.		Pkg.
Self-Aligning Spring-Tab Nut with Button Head Fastener



		1 1/2", 40 mm	3", 80 mm	4 1/2", 120 mm	Center	M4	10	Silver	Zinc-Plated Steel	Silver	Zinc-Plated Steel	4	5158N41	00000


		Hammer Nut with Button Head Fastener



				1", 25 mm	2", 50 mm	3"	Center	M4	8	Silver	Zinc-Plated Steel	Silver	Zinc-Plated Steel	4	5158N34	0000


				1"	2"	3"	Center	M4	10	Silver	Zinc-Plated Steel	Silver	Zinc-Plated Steel	4	3136N398	0000
				45 mm	90 mm	—	Center	M4	12	Silver	Zinc-Plated Steel	Silver	Zinc-Plated Steel	4	5158N37	0000


				Hammer Nut with Flanged Button Head Fastener



						1", 25 mm	2", 50 mm	3"	Center	M4	10	Silver	Zinc-Plated Steel	Silver	Zinc-Plated Steel	4	5158N33	0000

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.

Steel—Best for dry environments since moisture will cause these inserts to rust.

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.

Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these inserts won't degrade when exposed to harsh weather, salt water, and most 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.
Steel



		M4 x 0.7 mm	7.2	5.2	6.4	18.3	0.8	5.6	5.6	25	90975A111	00000


		Zinc-Plated Steel



				M4 x 0.7 mm	6	5.5	5.2	15	0.8	5.6	5.6	100	98965A110	00000


				M4 x 0.7 mm	8	5.5	7.2	15	0.8	5.6	5.6	100	98965A120	00000


				18-8 Stainless Steel



						M4 x 0.7 mm	7.1	5.2	6.3	15	0.8	5.6	5.6	10	94904A101	00000


						M4 x 0.7 mm	9.1	5.2	8.3	15	0.8	5.6	5.6	10	94904A107	00000


						Highly Corrosion-Resistant 316 Stainless Steel



								M4 x 0.7 mm	7.1	5.2	6.3	15	0.8	5.6	5.6	10	94884A101	00000


								M4 x 0.7 mm	9.1	5.2	8.3	15	0.8	5.6	5.6	10	94884A111	0000

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

7075 Aluminum—Won’t scratch or wear down aluminum T-slot tracks. These nuts have a steel insert for strength, extending their life.

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



		5	M4 × 0.7 mm	9	9	3	6.5	DIN 508	90510A231	00000


		7075 Aluminum with Steel Insert



				6	M4 × 0.7 mm	10	10	4	8	DIN 508	91136A121	00000

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.

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



		M4 × 0.7 mm	23	1.2	6.35	12.7	5	1	98007A479	00000


		M4 × 0.7 mm	23	1.2	9	2.7	5	10	98007A316	00000
		M4 × 0.7 mm	38	1.2	6.35	12.7	4, 5	1	98007A481	0000
		M4 × 0.7 mm	38	1.2	9	2.7	4, 5	5	98007A413	00000

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	Pkg. Qty.		Pkg.
Steel



	M4 × 0.7 mm	7	3.5	4.3	50	93975A710	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.

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



		M4 × 0.7 mm	23	1.2	6.35	12.7	5	—	1	93553A410	00000


		M4 × 0.7 mm	23	1.2	8.8	2.7	5	Material Certificate	10	93553A220	00000

Long-Barrel Round Weld Nuts

With an extended barrel and a round flange, these nuts distribute force evenly to prevent pull-through. The barrel is twice as long as standard round weld nuts, so more threads connect with your bolt for a great grip. You can weld these nuts in two orientations: on top of a flat surface or with the barrel sticking through the hole.

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.

Zinc-Plated Steel—A step up from plain steel, these nuts withstand occasional exposure to moisture. Weld them to uncoated steel surfaces. If MIG or TIG welding, grind the zinc plating off the part of the nut you intend to weld.

Number of Projections—Weld these nuts on top of metal—the projections on the bottom will fuse to the surface. 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	Dia.	Thk.	Dia.	Ht.	Pkg. Qty.		Pkg.
Steel



		M4 × 0.7 mm	0	18	0.8	5.3	6.3	50	90563A116	000000


		Zinc-Plated Steel



				M4 × 0.7 mm	0	18	0.8	5.3	6.3	50	90563A590	00000

Steel Adhesive-Ready Nuts

Add strong threads to material that you can't drill or that's 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. They can also be molded into plastics or composites. A zinc plating helps keep these nuts from rusting in wet environments.

		Base, mm		Nut, mm
	Thread Size	Dia.	Thk.	Wd.	Ht.	Hole Dia., mm	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		M4 × 0.7 mm	23	1.2	8	3.6	5	10	98007A125	00000


		M4 × 0.7 mm	38	1.2	8	3.6	4, 5	10	98007A131	0000

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.

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



		M4 × 0.7 mm	0	22	11	2.4	5.2	0.8	5.6	10	98001A157	00000


		M4 × 0.7 mm	2	16	9.6	2.4	5.2	0.8	5.2	25	92006A250	0000


		18-8 Stainless Steel



				M4 × 0.7 mm	2	16	9.6	2.4	5.2	0.8	5.2	10	98697A810	0000

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	Pkg. Qty.		Pkg.
Steel



		M4 × 0.7 mm	9	2.85	6	0.65	6	100	93337A500	000000


		18-8 Stainless Steel



				M4 × 0.7 mm	9	2.9	6	0.65	6	50	93418A300	0000

Round Weld Nuts

With three projections and a short collar, weld these nuts under low-clearance areas without sacrificing strength. The projections concentrate heat away from the threads to prevent them from deforming and create consistent welds. To make welding easier, their collar pilot guides them into the hole and aligns them with the surface while also shielding 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.

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

		Base, mm		Collar, mm
	Thread Size	Dia.	Thk.	Dia.	Ht.	Certificate Type	Pkg. Qty.		Pkg.
Steel



		M4 × 0.7 mm	9.6	2.6	5.5	0.8	—	50	90583A310	00000


		18-8 Stainless Steel



				M4 × 0.7 mm	9.4	2.6	5.5	0.8	Material Certificate	25	90583A210	0000

Stainless Steel Narrow-Base Adhesive-Ready Nuts

Add corrosion-resistant threads to channels, corners, and other tight spaces without drilling a hole. Glue these nuts on to thin surfaces and materials too hard and brittle to drill, such as acrylic and carbon fiber. Large holes in the base allow adhesive and resin to flow and spread along the joint for a good bond. You can mold them into plastics or composites. Made of 316 stainless steel, these nuts are excellent at resisting chemicals and salt water.

The base of these nuts acts like a flange, distributing pressure evenly across the mounting surface. Larger bases spread the pressure over more surface for a strong bond, while smaller bases fit better in tight spaces.

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



		M4 × 0.7 mm	24	11.5	1.2	8.8	2.7	5	5	93512A270	000000


		M4 × 0.7 mm	38	15	1.2	8.8	2.7	5	5	93512A280	00000

Offset-Barrel Low-Profile Rectangular Weld Nuts

Add permanent threads on corners and near edges. With a slim base and a short, offset barrel, these weld nuts fit in tight spaces such as channels and low-clearance areas.

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.

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	Certificate Type	Pkg. Qty.		Pkg.
Steel



		M4 × 0.7 mm	0	16	11	2.4	5.2	0.8	5.3	Material Certificate	10	94579A670	00000


		M4 × 0.7 mm	1	16	11	2.4	5.2	0.08	5.6	—	25	93172A180	00000


		Zinc-Plated Steel



				M4 × 0.7 mm	0	16	11	2.4	5.2	0.8	5.3	—	10	94579A850	0000


				18-8 Stainless Steel



						M4 × 0.7 mm	0	15.9	9.6	2.4	5.2	0.8	5.6	—	10	94581A161	00000


						M4 × 0.7 mm	1	15.9	9.6	2.4	5.2	0.8	5.6	Material Certificate	5	92413A190	0000

Steel Narrow-Base Adhesive-Ready Nuts

Fit these nuts into channels, corners, and other tight spaces to add strong threads without drilling a hole. They’re ideal for material that’s too thin or too hard and brittle to drill, such as acrylic and carbon fiber. For a strong hold, large holes in the base let adhesive and resin flow through and spread out. You can also mold these nuts into plastics or composites. Thanks to a zinc plating, they resist rusting in wet environments.

		Base, mm			Nut, mm
	Thread Size	Lg.	Wd.	Thk.	Wd.	Ht.	Hole Dia., mm	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		M4 × 0.7 mm	24	11.5	1.2	8.8	2.7	5	10	93552A270	00000


		M4 × 0.7 mm	38	15	1.2	8.8	2.7	5	5	93552A280	0000