Metric Thumb Screw Nuts | McMaster-Carr

	Thread Size Thread Size

	Thread Pitch Thread Pitch

	Material Material

	Finish Finish

Black Oxide

Zinc Plated

Passivated

	Thumb Nut Profile Thumb Nut Profile


Standard	Low

Flanged

	Nut Type Nut Type


Thumb	Flange

	Head Diameter Head Diameter

	Height Height

	Collar Height Collar Height

	Collar Diameter Collar Diameter

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

REACH Compliant

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Specifications Met Specifications Met

77 Products

About Nuts, Materials, and Finishes

An aluminum insert with strong threads withstands more torque during installation. They're chemical resistant, nonconductive, and lightweight. The head is knurled for slip-resistant controlled adjustment and the collar raises the head to make it easy to grip.

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

Thread		Collar
Size	Pitch, mm	Dia., mm	Ht., mm	Head Dia., mm	Ht., mm	Temp. Range, °F	Color	Pkg. Qty.		Pkg.
Acetal Plastic
M3	0.5	9.1	1.2	9.6	5.6	32° to 180°	Black	10	000000000	00000
M4	0.7	9.9	2.4	13	6.7	32° to 180°	Black	10	000000000	0000
M5	0.8	11.5	3.2	16	7.5	32° to 180°	Black	10	000000000	0000
M6	1	13.6	4.8	19	9.1	32° to 180°	Black	10	000000000	0000
M6	1	14.3	1.6	26	9.1	32° to 180°	Black	10	000000000	00000
M8	1.25	16.3	3.2	26	10.7	32° to 180°	Black	10	000000000	00000

Metric 18-8 Stainless Steel Knurled-Head Thumb Nuts

Made from 18-8 stainless steel, these metric thumb nuts have good chemical resistance and may be mildly magnetic. The head is knurled for slip-resistant controlled adjustment and the collar raises the head to make it easy to grip.

Black-oxide stainless steel nuts have a dark surface color.

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

Thread		Collar
Size	Pitch, mm	Dia., mm	Ht., mm	Head Dia., mm	Ht., mm	Specifications Met		Each
18-8 Stainless Steel
M2	0.4	5	4	10	6	__	000000000	00000
M2.5	0.45	6	5	12	7.5	__	000000000	0000
M3	0.5	6	5	12	7.5	DIN 466	000000000	0000
M3.5	0.6	8	6	16	9.5	__	000000000	0000
M4	0.7	8	6	16	9.5	DIN 466	000000000	0000
M5	0.8	10	7.5	20	11.5	DIN 466	000000000	0000
M6	1	12	10	24	15	DIN 466	000000000	0000
M8	1.25	16	12	30	18	DIN 466	000000000	00000
M10	1.5	20	15	36	23	DIN 466	000000000	00000
M12	1.75	19	12	25.4	22	__	000000000	00000
M14	2	28	20	56	30	__	000000000	00000
M16	2	32	25	64	35	__	000000000	00000
Black-Oxide 18-8 Stainless Steel
M2	0.4	5	4	10	6	__	000000000	0000
M3	0.5	6	5	12	7.5	DIN 466	000000000	0000
M4	0.7	8	6	16	9.5	DIN 466	000000000	0000
M5	0.8	10	7.5	20	11.5	DIN 466	000000000	0000
M6	1	12	10	24	15	DIN 466	000000000	0000
M8	1.25	16	12	30	18	DIN 466	000000000	00000
M10	1.5	20	15	36	23	DIN 466	000000000	00000
M12	1.75	19	12	25.4	22	__	000000000	0000

Low-Profile Thumb Nuts

Use these thumb nuts in low-clearance applications or jam one against another nut to hold it in place. The knurls provide a slip-resistant grip for controlled adjustment. A black-oxide finish provides mild corrosion resistance in dry environments.

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

Metric

Thread		Collar
Size	Pitch, mm	Dia.	Ht., mm	Head Dia., mm	Ht., mm	Specifications Met	Pkg. Qty.		Pkg.
Black-Oxide Steel
M4	0.7	8	0.5	16	4	DIN 467	1	000000000	00000
M5	0.8	10	1	20	5	DIN 467	1	000000000	0000
M6	1	12	1	24	6	DIN 467	1	000000000	0000
M8	1.25	16	2	30	8	DIN 467	1	000000000	0000
M10	1.5	20	2	36	10	DIN 467	1	000000000	0000
M12	1.75	20	2	36	10	DIN 467	1	000000000	0000

Metric 18-8 Stainless Steel Flanged Knurled-Head Thumb Nuts

Made from 18-8 stainless steel, these thumb nuts have good chemical resistance and may be mildly magnetic. The flange distributes the load over a large area and reduces stress where the nut meets the material surface. A knurled head provides a slip-resistant grip for controlled adjustment.

Passivated stainless steel nuts provide added protection against oxidation and corrosion.

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

Thread		Collar
Size	Pitch, mm	Dia., mm	Ht., mm	Head Dia., mm	Ht., mm		Each
18-8 Stainless Steel
M1.6	0.35	4	4	6	6	000000000	00000
M1.6	0.35	4	4	8	6	000000000	0000
M2	0.4	4	2	6	4	000000000	0000
M2	0.4	4	4	8	6	000000000	0000
M2.5	0.45	4	5	12	7	000000000	0000
M2.5	0.45	5	3	6	6	000000000	0000
M2.5	0.45	6	3	8	6	000000000	0000
M3	0.5	6	3	8	6	000000000	0000
M3	0.5	6	5	16	8	000000000	0000
M3.5	0.6	9	4	10	7	000000000	0000
M4	0.7	8	6	12	10	000000000	0000
M4	0.7	8	6	20	10	000000000	00000
M4	0.7	9	4	10	7	000000000	0000
M5	0.8	10	7.5	16	12	000000000	0000
M5	0.8	10	7.5	24	12	000000000	00000
M5	0.8	11	5	13	9	000000000	0000
M6	1	12	5	13	9	000000000	0000
M6	1	12	10	20	15	000000000	00000
M6	1	12	10	24	15	000000000	00000
M8	1.25	16	6	19	12	000000000	0000
M8	1.25	16	12	24	18	000000000	00000
M8	1.25	16	12	31.8	18	000000000	00000
M10	1.5	20	15	26	23	000000000	00000
M10	1.5	20	15	31.8	23	000000000	00000
M12	1.75	24	20	31.8	30	000000000	00000
Black-Oxide 18-8 Stainless Steel
M2.5	0.45	5	3	6	6	000000000	0000
M3	0.5	6	3	8	6	000000000	0000
M3.5	0.6	9	4	10	7	000000000	0000
M4	0.7	9	4	10	7	000000000	0000
M5	0.8	11	5	13	9	000000000	0000
M6	1	12	5	13	9	000000000	0000
M8	1.25	16	6	19	12	000000000	00000
Passivated 18-8 Stainless Steel
M2.5	0.45	5	3	6	6	000000000	0000
M3	0.5	6	3	8	6	000000000	0000
M4	0.7	9	4	10	7	000000000	0000
M5	0.8	11	5	13	9	000000000	0000
M6	1	12	5	13	9	000000000	0000
M8	1.25	16	6	19	12	000000000	00000

Metric Brass Flanged Knurled-Head Thumb Nuts

Made from zinc-plated brass, these thumb nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. The flange distributes the load over a large area and reduces stress where the nut meets the material surface. A knurled head provides a slip-resistant grip for controlled adjustment.

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

Thread		Collar
Size	Pitch, mm	Dia., mm	Ht., mm	Head Dia., mm	Ht., mm		Each
Zinc-Plated Brass
M2.5	0.45	5	3	6	6	000000000	00000
M3	0.5	6	3	8	6	000000000	0000
M3.5	0.6	9	4	10	7	000000000	0000
M4	0.7	9	4	10	7	000000000	0000
M5	0.8	11	5	13	9	000000000	0000
M6	1	12	5	13	9	000000000	0000
M8	1.25	16	6	19	12	000000000	0000

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About Nuts, Materials, and Finishes

Reinforced Plastic Knurled-Head Thumb Nuts

Metric 18-8 Stainless Steel Knurled-Head Thumb Nuts

Low-Profile Thumb Nuts

Metric 18-8 Stainless Steel Flanged Knurled-Head Thumb Nuts

Metric Brass Flanged Knurled-Head Thumb Nuts