M8 T Slots | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size	Show

	Thread Size Thread Size	Hide

	Rail Height Rail Height

	Rail Profile Rail Profile

	Single
	Double
	Quad
	Triple

	Nut Style Nut Style


Single	Hammer

Self-Aligning	Double

	For Slot Width For Slot Width

	Material Material

Stainless Steel

Steel

	T-Slot Framing Component T-Slot Framing Component


Fastener	Structural Bracket

Threaded Mounting Base

	Mounting Fastener Installation Type Mounting Fastener Installation Type

End Feed

Drop In

	Fastener Type Fastener Type

Nut

	Mounting Hole Location Mounting Hole Location

Center

Offset

	Base Width Base Width

	Threading Threading

Fully Threaded

Partially Threaded

	Concealed Bracket Style Concealed Bracket Style

	Tee

	Color Color

	Silver
	Black

	Finish Finish

Zinc Plated

Black Oxide

	Thread Pitch Thread Pitch

1.25 mm

	Bracket Type Bracket Type

	Concealed

	Base Height Base Height

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	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

RoHS Compliant with
Exemptions

	Head Type Head Type

24 Products

T-Slotted Framing Structural Brackets

Connect T-slotted rails and reinforce joints for structural stability. Fasteners are included.

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

Tee Concealed Brackets

Tee Concealed Bracket (Thread the connector directly into a T-slot and use the included fastener to secure.)

Concealed brackets mount internally and stay out of sight once installed.

Tee concealed brackets thread directly into a T-slot and use the included fastener to secure.

For Rail Ht.
Single	Double and Quad	Triple	Color	Material	Mounting Fasteners Included		Each
1 1/2", 40mm	3", 80mm	4 1/2"	Silver	Zinc-Plated Steel	Yes	000000000	000000
45mm	90mm	__	Silver	Zinc-Plated Steel	Yes	00000000	00000

T-Slotted Framing Fasteners

Screw and nut sets or nuts secure brackets and other accessories to rails.

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

End-Feed Fasteners

Single Nut

Double Nut

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

Use double and triple fasteners to install brackets with multiple holes. They eliminate the need for a single nut and screw for each hole.

Self-aligning fasteners have a ridge that keeps them centered in the T-slot.

For Rail Ht.			Nut			Mounting
Single	Double and Quad	Triple	Color	Material	Thread Size	Hole Location	Pkg. Qty.		Pkg.
Single Nut
40mm	80mm	120mm	Black	Zinc-Plated Steel	M8	Offset	10	00000000	00000
45mm	90mm	__	Black	Zinc-Plated Steel	M8	Offset	10	00000000	0000
Double Nut
40mm	80mm	120mm	Black	Zinc-Plated Steel	M8	Offset	10	00000000	0000
45mm	90mm	__	Black	Zinc-Plated Steel	M8	Offset	10	00000000	00000
Self-Aligning Nut
1 1/2", 30mm, 40mm	3", 60mm, 80mm	4 1/2", 120mm	Silver	Steel	M8	Center	1	00000000	0000
45mm	90mm	__	Silver	Zinc-Plated Steel	M8	Center	4	00000000	0000

Drop-In Fasteners

Hammer Nut

Drop-in fasteners can be placed directly into the T-slot to attach components—no need to disassemble your existing structure. They consist of a screw and nut.

Hammer fasteners drop in to the slot and turn into place when the screw is tightened. They're serrated to break the anodized coating on the rail, allowing static to dissipate.

For Rail Ht.		Nut		Mounting
Single	Double and Quad	Color	Material	Hole Location	Thread Size	Pkg. Qty.		Pkg.
Hammer Nut
45mm	90mm	Silver	304 Stainless Steel	Center	M8	1	00000000	00000

T-Slotted Framing Mounting Brackets

Attach sensors, tubes, and other components to T-slotted framing rails and structures.

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

Threaded Mounting Bases

Threaded Mounting Base

Threaded mounting bases attach threaded rod (sold separately) to a framing system.

For Rail Ht.			Thread
Single	Double and Quad	Triple	Size	Lg., mm	Wd.	Lg.	Color	Material	Mounting Fasteners Included		Each
1"	2"	3"	M8 × 1.25mm	16	1"	1 3/4"	Black	Steel	Yes	00000000	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
M8	1.25	10	6	16	11	__	000000000	00000	000000000	00000
M8	1.25	12	7	18	14	DIN 508	000000000	0000	000000	00
M8	1.25	14	8	22	16	DIN 508	000000000	0000	000000	00
M8	1.25	16	9	25	18	DIN 508	000000000	0000	000000	00
M8	1.25	18	10	28	20	DIN 508	000000000	00000	000000	00
18-8 Stainless Steel
M8	1.25	10	6	15	12	DIN 508	000000000	0000	000000	00

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
M8	1.25	12	6.4	15.9	15.9	4	Hex	Set Screw	000000000	000000

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
M8	1.25	10	6	15	12	000000000	00000

T-Slot Bolts

Machined Neck

For quicker setups than a separate T-slot nut and stud, slide these bolts into T-slot tracks on machine tool tables.

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

			Head						Partially Threaded
Thread Lg.	Lg.	For Slot Wd.	Lg.	Wd.	Ht.	Min. Tensile Strength, psi	Fastener Strength Grade/Class	Specifications Met		Each
Machined Neck—Black-Oxide Steel
M8 × 1.25mm
22mm	32mm	8mm	13mm	13mm	6mm	150,000	Class 10.9	DIN 787	000000000	000000
35mm	50mm	8mm	13mm	13mm	6mm	150,000	Class 10.9	DIN 787	000000000	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
M8 Thread Size × 1.25mm Thread Pitch
10mm	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	6mm	16mm	11mm	Threaded on Both Ends	125,000	Black-Oxide Steel	0000000	0000000

Setup Clamp and T-Slot Fastener Kits

Wood Stand and Steel Tray

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
M8 × 1.25 mm Thread Size
10	47	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 4 T-Slot Nuts 6 Flange Nuts 4 Coupling Nuts T-Slot Cleaner	19-152	25	16	Steel	Wood Stand and Steel Tray	0000000	0000000

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
5"	0.392"	M8	1.25	7/32"	1 11/64"	35/64"	39/64"	1.5 mm × 60°	0.713"	Steel	0000000	000000