Metric Thumb Nuts | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	Thread Type Thread Type

Metric

	Thread Size Thread Size

	Thread Pitch Thread Pitch

	Material Material

	Thumb Nut Profile Thumb Nut Profile


Standard	Flanged

Narrow

	Nut Type Nut Type


Thumb	Flange

	Head Diameter Head Diameter

	Height Height

	Thumb Nut Head Shape Thumb Nut Head Shape

Round

Wing

Spade

	Collar Height Collar Height

	Collar Diameter Collar Diameter

	Thread Spacing Thread Spacing

Coarse

	Specifications Met Specifications Met

DIN 466

DIN 315

	Thread Fit Thread Fit

Class 2B

Class 6H

	Threading Threading

	Fully Threaded
	Partially Threaded

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Width Width

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

REACH Compliant

	Finish Finish

Zinc Plated

Black Oxide

Passivated

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Wing Nut Profile Wing Nut Profile

	Standard

	Base Diameter Base Diameter

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186 Products

About Nuts, Materials, and Finishes

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	0000
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

Reinforced Plastic Knurled-Head Thumb Nuts

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 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	0000
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	0000
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	0000
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	0000

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

Metric 18-8 Stainless Steel Wing Nuts

Made from 18-8 stainless steel, these nuts have good chemical resistance and may be mildly magnetic. The wings provide more leverage for greater torque while tightening than knurled-head thumb nuts.

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

Thread
Size	Pitch, mm	Base Dia., mm	Wd., mm	Ht., mm	Specifications Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel
M3	0.5	8	19.5	10	DIN 315	25	000000000	000000
M4	0.7	9	21.5	10.3	DIN 315	10	000000000	0000
M5	0.8	10.5	21.5	10.3	DIN 315	10	000000000	0000
M6	1	13	26.3	12.7	DIN 315	10	000000000	0000
M8	1.25	15.25	30.1	15.1	DIN 315	10	000000000	00000
M10	1.5	18	34.9	18.3	DIN 315	5	000000000	00000
M12	1.75	23	47.6	23.8	DIN 315	1	000000000	0000
M14	2	26.6	58.3	28.5	DIN 315	1	000000000	00000
M16	2	26.6	58.3	28.5	DIN 315	1	000000000	00000
M18	2.5	29.5	68.5	33.8	DIN 315	1	000000000	00000
M20	2.5	29.5	68.5	33.8	DIN 315	1	000000000	00000

Metric Super-Corrosion-Resistant 316 Stainless Steel Wing Nuts

Made from 316 stainless steel, these wing nuts have excellent chemical resistance and can be used in saltwater environments. The wings provide more leverage for greater torque while tightening than knurled-head thumb nuts.

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

Thread
Size	Pitch, mm	Base Dia., mm	Wd., mm	Ht., mm	Specifications Met	Pkg. Qty.		Pkg.
316 Stainless Steel
M3	0.5	8	19.5	10	DIN 315	10	000000000	000000
M4	0.7	8	19.5	10	DIN 315	10	000000000	00000
M5	0.8	10.3	23	12	DIN 315	10	000000000	00000
M6	1	13	26.3	12.7	DIN 315	5	000000000	0000
M8	1.25	15.25	30.1	15.1	DIN 315	5	000000000	0000
M10	1.5	18	34.93	18.3	DIN 315	1	000000000	0000
								Each
M12	1.75	22.5	49.4	22.3	DIN 315	__	000000000	0000
M14	2	26	52.7	30.8	DIN 315	__	000000000	00000
M16	2	26.6	58.3	30.8	DIN 315	__	000000000	00000

Metric Steel and Iron Wing Nuts

These nuts have wings that provide more leverage for greater torque while tightening than knurled-head thumb nuts.

Zinc-plated wing nuts are corrosion resistant in wet environments.

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

Thread
Size	Pitch, mm	Base Dia., mm	Wd., mm	Ht., mm	Specifications Met	Pkg. Qty.		Pkg.
Style 1
Zinc-Plated Steel—Class 5
M3	0.5	8	19.5	10	DIN 315	25	000000000	00000
M4	0.7	8	17.6	8.6	DIN 315	50	000000000	00000
M5	0.8	10.3	22.5	11	DIN 315	25	000000000	0000
M6	1	12.7	27.8	13.6	DIN 315	25	000000000	0000
M8	1.25	13.8	30.3	14.8	DIN 315	20	000000000	0000
M10	1.5	16.5	36.2	17.7	DIN 315	10	000000000	0000
M12	1.75	22.5	49.4	24.1	DIN 315	5	000000000	0000
Style 2
Zinc-Plated Steel
M6	1	12.7	34.9	15.9	__	5	000000000	00000
M8	1.25	12.7	36.5	17.5	__	5	000000000	00000
M16	2	26.99	69.9	30.2	__	1	000000000	0000
M20	2.5	31.75	74.6	30.2	__	1	000000000	0000
Zinc-Plated Iron
M5	0.8	9.53	28.6	12.7	__	5	000000000	00000
M10	1.5	16	41.3	20.6	__	1	000000000	0000
M14	2	21	57.2	25.4	__	1	000000000	0000
Style 3
Zinc-Plated Steel
M6	1	16	27	17.5	__	5	000000000	00000
M6	1	19.05	25.4	11.9	__	5	000000000	00000
M8	1.25	22.23	41.3	25.4	__	5	000000000	00000
M10	1.5	22.23	41.3	25.4	__	1	000000000	0000
Style 4
Steel
M7	1	24.5	76.2	19.1	__	1	000000000	0000
M8	1.25	24.5	76.2	19.1	__	1	000000000	0000
M10	1.5	24.5	76.2	19.1	__	1	000000000	0000
M12	1.75	24.5	76.2	19.1	__	1	000000000	0000
M14	2	24.5	76.2	19.1	__	1	000000000	0000
Zinc-Plated Steel
M7	1	24.5	76.2	19.1	__	1	000000000	0000
M8	1.25	24.5	76.2	19.1	__	1	000000000	0000
M10	1.5	24.5	76.2	19.1	__	1	000000000	0000
M12	1.75	24.5	76.2	19.1	__	1	000000000	0000
M14	2	24.5	76.2	19.1	__	1	000000000	0000
Style 5
Zinc-Plated Steel—Class 5
M4	0.7	8	20	10.5	DIN 315	10	000000000	0000
M5	0.8	11	26	13	DIN 315	10	000000000	0000
M6	1	13	33	17	DIN 315	10	000000000	0000
M8	1.25	16	39	20	DIN 315	5	000000000	0000
M10	1.5	20	51	25	DIN 315	5	000000000	00000
M12	1.75	23	65	33.5	DIN 315	1	000000000	0000
M16	2	29	73	37.5	DIN 315	1	000000000	00000
Iron
M14	2	30.16	76.2	31.8	__	1	000000000	0000
M16	2	30.16	76.2	31.8	__	1	000000000	0000
M18	2.5	30.16	76.2	31.8	__	1	000000000	0000
M20	2.5	30.16	76.2	31.8	__	1	000000000	0000
M22	2.5	30.16	76.2	31.8	__	1	000000000	00000
Zinc-Plated Iron
M14	2	30.16	76.2	31.8	__	1	000000000	0000
M16	2	30.16	76.2	31.8	__	1	000000000	0000
M18	2.5	30.16	76.2	31.8	__	1	000000000	00000
M20	2.5	30.16	76.2	31.8	__	1	000000000	00000
M22	2.5	30.16	76.2	31.8	__	1	000000000	00000
Style 6
Iron
M14	2	28.6	114.3	47.6	__	1	000000000	0000
M14	2	35.72	155.6	63.5	__	1	000000000	00000
M16	2	28.6	114.3	47.6	__	1	000000000	00000
M16	2	35.72	155.6	63.5	__	1	000000000	00000
M16	2	44.45	203.2	79.4	__	1	000000000	00000
M18	2.5	28.6	114.3	47.6	__	1	000000000	00000
M18	2.5	35.72	155.6	63.5	__	1	000000000	00000
M18	2.5	44.45	203.2	79.4	__	1	000000000	00000
M20	2.5	28.6	114.3	47.6	__	1	000000000	00000
M20	2.5	35.72	155.6	63.5	__	1	000000000	00000
M20	2.5	44.45	203.2	79.4	__	1	000000000	00000
M22	2.5	28.6	114.3	47.6	__	1	000000000	00000
M22	2.5	35.72	155.6	63.5	__	1	000000000	00000
M22	2.5	44.45	203.2	79.4	__	1	000000000	00000
M24	3	44.45	203.2	79.4	__	1	000000000	00000
M27	3	44.45	203.2	79.4	__	1	000000000	00000
Zinc-Plated Iron
M14	2	28.6	114.3	47.6	__	1	000000000	0000
M14	2	35.72	155.6	63.5	__	1	000000000	00000
M16	2	28.6	114.3	47.6	__	1	000000000	00000
M16	2	35.72	155.6	63.5	__	1	000000000	00000
M16	2	44.45	203.2	79.4	__	1	000000000	00000
M18	2.5	28.6	114.3	47.6	__	1	000000000	00000
M18	2.5	35.72	155.6	63.5	__	1	000000000	00000
M18	2.5	44.45	203.2	79.4	__	1	000000000	00000
M20	2.5	28.6	114.3	47.6	__	1	000000000	00000
M20	2.5	35.72	155.6	63.5	__	1	000000000	00000
M20	2.5	44.45	203.2	79.4	__	1	000000000	00000
M22	2.5	28.6	114.3	47.6	__	1	000000000	00000
M22	2.5	35.72	155.6	63.5	__	1	000000000	00000
M22	2.5	44.45	203.2	79.4	__	1	000000000	00000
M24	3	44.45	203.2	79.4	__	1	000000000	00000
M27	3	44.45	203.2	79.4	__	1	000000000	00000
Style 7
Zinc-Plated Steel
M6	1	22.22	38.1	14.3	__	1	000000000	0000
M8	1.25	22.22	38.1	14.3	__	1	000000000	0000

Metric Plastic Wing Nuts

Made from nylon 6/6, these wing nuts are chemical resistant, nonconductive, and lightweight. The wings provide more leverage for greater torque while tightening than knurled-head thumb nuts.

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

Thread
Size	Pitch, mm	Base Dia., mm	Wd., mm	Ht., mm	Choose a Color	Pkg. Qty.		Pkg.
Nylon 6/6 Plastic
M4	0.7	10.2	22.8	12.2	Black, Off-White	50	000000000	000000
M5	0.8	10.2	22.8	12.2	Black, Off-White	50	000000000	00000
M6	1	14.2	27.7	16	Black, Off-White	50	000000000	00000
M8	1.25	16.2	34.8	18.3	Black, Off-White	50	000000000	00000
M10	1.5	16.2	34.8	18.3	Black, Off-White	50	000000000	00000
M12	1.75	21.4	44.7	22.7	Black, Off-White	25	000000000	00000

Sanitary Spade-Head Thumb Nuts

Standard

Narrow

Cover and protect threads in sanitary environments, such as food-processing or pharmaceutical plants. These thumb nuts are easily adjusted by hand, so there’s no need for tools that could contaminate or scratch equipment. Made of 316 stainless steel, they resist corrosion from frequent washdowns with harsh cleaners. They have extremely smooth surfaces, rounded edges, and no horizontal ledges—all of which help prevent bacteria from growing.

Standard thumb nuts are easier to grip than narrow thumb nuts, so they give you greater leverage for turning.

Narrow thumb nuts have a slim profile to fit into tight spaces.

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

Thread
Size	Pitch, mm	Dp., mm	Base Dia., mm	Wd., mm	Ht., mm	Surface Smoothness, microinch		Each
316 Stainless Steel
Standard Profile
M4	0.7	6	10.8	20	19	32	000000000	000000
M5	0.8	6	11.8	21	21	32	000000000	00000
M6	1	7	14.2	25	25	32	000000000	00000
M8	1.25	9	18	33	33	32	000000000	00000
M10	1.5	11	22.3	40	40	32	000000000	00000
Narrow Profile
M4	0.7	6	9	9	20	32	000000000	00000
M5	0.8	6	10	10	22	32	000000000	00000
M6	1	7	12	12	22	32	000000000	00000
M8	1.25	9	16	16	25	32	000000000	00000
M10	1.5	11	20	20	30	32	000000000	00000

About Nuts, Materials, and Finishes

Metric 18-8 Stainless Steel Knurled-Head Thumb Nuts

Reinforced Plastic Knurled-Head Thumb Nuts

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

Metric Brass Flanged Knurled-Head Thumb Nuts

Metric 18-8 Stainless Steel Wing Nuts

Metric Super-Corrosion-Resistant 316 Stainless Steel Wing Nuts

Metric Steel and Iron Wing Nuts

Metric Plastic Wing Nuts

Sanitary Spade-Head Thumb Nuts