Metric Finger Nuts | McMaster-Carr

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

REACH

Compliant

Not Compliant

DFARS Specialty Metals

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Export Control Classification Number (ECCN)

EAR99

Performance

Corrosion Resistant

Highly Corrosion Resistant

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How can we improve?

144 Products

Thumb Nut Grip Type

Knurled Head

Get a good grip, even with oily fingers

77 products

Wing

Give you more leverage than knurled-head nuts for a tighter fit

57 products

Thumb Nut Grip Type

Hex Head

Twist on by hand, then crank with a wrench for an extra-tight fit

0 products

Environment

Sanitary

Free of crevices where bacteria can grow

10 products

Flanged Knurled-Head Thumb Nuts

The slip-resistant head is easy to grip, while the flange distributes pressure evenly across the mounting surface without the need for a separate washer. These nuts are often used to secure screws in oversized or irregularly shaped holes since the flange covers a larger area than standard nuts.

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They resist rust in wet and outdoor environments, but won't hold up to the harsh chemicals that 316 stainless steel can.

Passivated 18-8 Stainless Steel—With an added layer of protection, these nuts stand up to strong acids and other harsh chemicals.

		Collar, mm
	Thread Size	Dia.	Ht.	Head Dia., mm	Ht., mm	Threading		Each
18-8 Stainless Steel



		M1.6 × 0.35 mm	4	4	6	6	Fully Threaded	96445A260	00000


		M1.6 × 0.35 mm	4	4	8	6	Fully Threaded	96445A270	0000
		M2 × 0.4 mm	4	2	6	4	Fully Threaded	96445A101	0000
		M2 × 0.4 mm	4	4	8	6	Fully Threaded	96445A280	0000
		M2.5 × 0.45 mm	4	5	12	7	Fully Threaded	96445A290	0000
		M2.5 × 0.45 mm	5	3	6	6	Fully Threaded	96445A320	0000
		M2.5 × 0.45 mm	6	3	8	6	Fully Threaded	96445A102	0000
		M3 × 0.5 mm	6	3	8	6	Fully Threaded	96445A330	0000
		M3 × 0.5 mm	6	5	16	8	Fully Threaded	96445A310	0000
		M3.5 × 0.6 mm	9	4	10	7	Fully Threaded	96445A340	0000
		M4 × 0.7 mm	8	6	12	10	Fully Threaded	96445A111	0000


		M4 × 0.7 mm	8	6	20	10	Fully Threaded	96445A112	00000
		M4 × 0.7 mm	9	4	10	7	Fully Threaded	96445A350	0000
		M5 × 0.8 mm	10	7.5	16	12	Fully Threaded	96445A113	0000
		M5 × 0.8 mm	10	7.5	24	12	Fully Threaded	96445A114	00000
		M5 × 0.8 mm	11	5	13	9	Fully Threaded	96445A360	0000
		M6 × 1 mm	12	5	13	9	Fully Threaded	96445A370	0000
		M6 × 1 mm	12	10	20	15	Fully Threaded	96445A115	00000
		M6 × 1 mm	12	10	24	15	Fully Threaded	96445A116	00000
		M8 × 1.25 mm	16	6	19	12	Fully Threaded	96445A380	0000
		M8 × 1.25 mm	16	12	24	18	Fully Threaded	96445A117	00000


		M8 × 1.25 mm	16	12	31.8	18	Fully Threaded	96445A118	00000
		M10 × 1.5 mm	20	15	26	23	Fully Threaded	96445A119	00000
		M10 × 1.5 mm	20	15	31.8	23	Fully Threaded	96445A121	00000
		M12 × 1.75 mm	24	20	31.8	30	Fully Threaded	96445A122	00000


		Black-Oxide 18-8 Stainless Steel



				M2.5 × 0.45 mm	5	3	6	6	Fully Threaded	96445A110	0000


				M3 × 0.5 mm	6	3	8	6	Fully Threaded	96445A130	0000
				M3.5 × 0.6 mm	9	4	10	7	Fully Threaded	96445A150	0000
				M4 × 0.7 mm	9	4	10	7	Fully Threaded	96445A170	0000
				M5 × 0.8 mm	11	5	13	9	Fully Threaded	96445A190	0000
				M6 × 1 mm	12	5	13	9	Fully Threaded	96445A220	0000
				M8 × 1.25 mm	16	6	19	12	Fully Threaded	96445A240	00000


				Passivated 18-8 Stainless Steel



						M2.5 × 0.45 mm	5	3	6	6	Fully Threaded	96445A120	0000


						M3 × 0.5 mm	6	3	8	6	Fully Threaded	96445A140	0000
						M4 × 0.7 mm	9	4	10	7	Fully Threaded	96445A180	0000
						M5 × 0.8 mm	11	5	13	9	Fully Threaded	96445A210	0000
						M6 × 1 mm	12	5	13	9	Fully Threaded	96445A230	0000
						M8 × 1.25 mm	16	6	19	12	Fully Threaded	96445A250	00000

Brass

Zinc-Plated Brass—The zinc plating offers better corrosion resistance than plain brass to stand up to solvents and mild chemicals.

		Collar, mm
	Thread Size	Dia.	Ht.	Head Dia., mm	Ht., mm	Threading		Each
Zinc-Plated Brass



		M2.5 × 0.45 mm	5	3	6	6	Fully Threaded	96115A410	00000


		M3 × 0.5 mm	6	3	8	6	Fully Threaded	96115A420	0000
		M3.5 × 0.6 mm	9	4	10	7	Fully Threaded	96115A480	0000
		M4 × 0.7 mm	9	4	10	7	Fully Threaded	96115A440	0000
		M5 × 0.8 mm	11	5	13	9	Fully Threaded	96115A450	0000
		M6 × 1 mm	12	5	13	9	Fully Threaded	96115A460	0000
		M8 × 1.25 mm	16	6	19	12	Fully Threaded	96115A470	0000

Knurled-Head Thumb Nuts

Get a good grip on these nuts, even with oily fingers. They have a raised, slip-resistant head, so you can tighten them by hand and make controlled adjustments. Knurled-head nuts have a smaller profile than wing nuts, so they fit in tighter spots.

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

		Collar, mm
	Thread Size	Dia.	Ht.	Head Dia., mm	Ht., mm	Threading	Specs. Met		Each
18-8 Stainless Steel



		M2 × 0.4 mm	5	4	10	6	Fully Threaded	—	90368A101	00000


		M2.5 × 0.45 mm	6	5	12	7.5	Fully Threaded	—	90368A102	0000
		M3 × 0.5 mm	6	5	12	7.5	Fully Threaded	DIN 466	90368A150	0000
		M3.5 × 0.6 mm	8	6	16	9.5	Fully Threaded	—	90368A104	0000
		M4 × 0.7 mm	8	6	16	9.5	Fully Threaded	DIN 466	90368A200	0000
		M5 × 0.8 mm	10	7.5	20	11.5	Fully Threaded	DIN 466	90368A250	0000
		M6 × 1 mm	12	10	24	15	Fully Threaded	DIN 466	90368A300	0000
		M8 × 1.25 mm	16	12	30	18	Fully Threaded	DIN 466	90368A325	0000
		M10 × 1.5 mm	20	15	36	23	Fully Threaded	DIN 466	90368A350	0000
		M12 × 1.75 mm	19	12	25.4	22	Fully Threaded	—	90368A103	0000
		M14 × 2 mm	28	20	56	30	Fully Threaded	—	90368A105	00000


		M16 × 2 mm	32	25	64	35	Fully Threaded	—	90368A106	00000


		Black-Oxide 18-8 Stainless Steel



				M2 × 0.4 mm	5	4	10	6	Fully Threaded	—	90368A107	0000


				M3 × 0.5 mm	6	5	12	7.5	Fully Threaded	DIN 466	90368A109	0000
				M4 × 0.7 mm	8	6	16	9.5	Fully Threaded	DIN 466	90368A111	0000
				M5 × 0.8 mm	10	7.5	20	11.5	Fully Threaded	DIN 466	90368A112	0000
				M6 × 1 mm	12	10	24	15	Fully Threaded	DIN 466	90368A113	0000
				M8 × 1.25 mm	16	12	30	18	Fully Threaded	DIN 466	90368A114	00000
				M10 × 1.5 mm	20	15	36	23	Fully Threaded	DIN 466	90368A115	00000
				M12 × 1.75 mm	19	12	25.4	22	Fully Threaded	—	90368A116	00000

Plastic

Reinforced Acetal—The best plastic for damp and wet environments, acetal won't swell or lose strength if exposed to moisture. These nuts are reinforced with an aluminum threaded insert, so they can handle more torque than other plastic nuts and won't crack during installation.

		Collar, mm
	Thread Size	Dia.	Ht.	Head Dia., mm	Ht., mm	Color	Threading	Insert Material	Pkg. Qty.		Pkg.
Reinforced Acetal



		M3 × 0.5 mm	9.1	1.2	9.6	5.6	Black	Fully Threaded	Aluminum	10	93886A220	00000


		M4 × 0.7 mm	9.9	2.4	13	6.7	Black	Fully Threaded	Aluminum	10	93886A230	0000
		M5 × 0.8 mm	11.5	3.2	16	7.5	Black	Fully Threaded	Aluminum	10	93886A240	00000
		M6 × 1 mm	13.6	4.8	19	9.1	Black	Fully Threaded	Aluminum	10	93886A250	00000
		M6 × 1 mm	14.3	1.6	26	9.1	Black	Fully Threaded	Aluminum	10	93886A260	00000
		M8 × 1.25 mm	16.3	3.2	26	10.7	Black	Fully Threaded	Aluminum	10	93886A270	00000

Low-Profile Knurled-Head Thumb Nuts

Twist these thumb nuts into spaces without a lot of clearance. They have a short, slip-resistant head, so you can grip them easily and make controlled adjustments in cramped spots. You can also use them as jam nuts by threading them against another nut to hold it in place.

Steel

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

		Collar, mm
	Thread Size	Dia.	Ht.	Head Dia., mm	Ht., mm	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Steel



		M4 × 0.7 mm	8	0.5	16	4	DIN 467	1	92815A201	00000


		M5 × 0.8 mm	10	1	20	5	DIN 467	1	92815A202	0000
		M6 × 1 mm	12	1	24	6	DIN 467	1	92815A203	0000
		M8 × 1.25 mm	16	2	30	8	DIN 467	1	92815A204	0000
		M10 × 1.5 mm	20	2	36	10	DIN 467	1	92815A205	0000
		M12 × 1.75 mm	20	2	36	10	DIN 467	1	92815A206	0000

Wing Nuts


Style 1	Style 4	Style 5	Style 7	Style 8

The easiest nuts to twist on and off by hand, these are commonly used to fasten parts that need to be frequently disassembled, such as access panels and covers. The wings give you more leverage than knurled-head nuts, so you can apply greater torque and achieve a tighter fit.

Steel

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

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

									Pkg.
	Thread Size	Wd., mm	Ht., mm	Base Dia., mm	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		1-9	10-49	50-Up
Zinc-Plated Steel







				Style 1

				M3 × 0.5 mm	19.5	10	8	Class 5	—	25	94300A120	00000	00000	00000


				M4 × 0.7 mm	17.6	8.6	8	Class 5	—	50	94300A310	0000	0000	0000
				M5 × 0.8 mm	22.5	11	10.3	Class 5	—	25	94300A320	0000	0000	0000
				M6 × 1 mm	27.8	13.6	12.7	Class 5	—	25	94300A330	0000	0000	0000
				M8 × 1.25 mm	30.3	14.8	13.8	Class 5	—	20	94300A340	0000	0000	0000
				M10 × 1.5 mm	36.2	17.7	16.5	Class 5	—	10	94300A350	0000	0000	0000
				M12 × 1.75 mm	49.4	24.1	22.5	Class 5	—	5	94300A360	0000	0000	0000




						Style 4

						M4 × 0.7 mm	20	10.5	8	Class 5	DIN 315	10	94300A411	0000	0000	0000


						M5 × 0.8 mm	26	13	11	Class 5	DIN 315	10	94300A412	00000	0000	0000
						M6 × 1 mm	33	17	13	Class 5	DIN 315	10	94300A413	00000	00000	0000
						M8 × 1.25 mm	39	20	16	Class 5	DIN 315	5	94300A414	00000	0000	0000
						M10 × 1.5 mm	51	25	20	Class 5	DIN 315	5	94300A415	00000	00000	0000
						M12 × 1.75 mm	65	33.5	23	Class 5	DIN 315	1	94300A416	0000	0000	0000
						M16 × 2 mm	73	37.5	29	Class 5	DIN 315	1	94300A417	00000	0000	0000




								Style 5

								M6 × 1 mm	34.9	15.9	12.7	—	—	5	94309A150	00000	00000	00000


								M8 × 1.25 mm	36.5	17.5	12.7	—	—	5	94309A155	00000	00000	00000
								M16 × 2 mm	69.9	30.2	26.99	—	—	1	94309A170	00000	00000	0000




										Style 7

										M6 × 1 mm	25.4	11.9	19.05	—	—	5	94309A350	00000	00000	00000


										M6 × 1 mm	27	17.5	16	—	—	5	94309A250	00000	00000	00000
										M6 × 1 mm	38.1	14.3	22.22	—	—	1	94309A355	0000	0000	0000
										M8 × 1.25 mm	38.1	14.3	22.22	—	—	1	94309A360	0000	0000	0000
										M8 × 1.25 mm	41.3	25.4	22.23	—	—	5	94309A255	00000	00000	00000
										M10 × 1.5 mm	41.3	25.4	22.23	—	—	1	94309A260	0000	0000	0000




												Style 8

M8 × 1.25 mm												76.2	19.1	24.5	—	—	1	94309A412	0000	0000	0000


M10 × 1.5 mm	76.2											19.1	24.5	—	—	1	94309A413	0000	0000	0000
M12 × 1.75 mm	76.2											19.1	24.5	—	—	1	94309A414	0000	0000	0000


Steel







												Style 8

												M8 × 1.25 mm	76.2	19.1	24.5	—	—	1	94309A441	0000	0000	0000


												M10 × 1.5 mm	76.2	19.1	24.5	—	—	1	94309A442	0000	0000	0000
				M12 × 1.75 mm								76.2	19.1	24.5	—	—	1	94309A443	0000	0000	0000

Iron

Style 5

Zinc-Plated Iron—A step up from plain iron, the zinc plating withstands occasional exposure to moisture.

							Pkg.
	Thread Size	Wd., mm	Ht., mm	Base Dia., mm	Pkg. Qty.		1-9	10-49	50-Up
Zinc-Plated Iron







				Style 5

				M5 × 0.8 mm	28.6	12.7	9.53	5	94309A145	000000	000000	000000


				M10 × 1.5 mm	41.3	20.6	16	1	94309A160	0000	0000	0000

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

Highly Corrosion-Resistant 316 Stainless Steel—Our most corrosion-resistant thumb nuts, these hold up in just about any environment. They won't degrade from exposure to weather, salt water, and most chemicals.

								Pkg.
	Thread Size	Wd., mm	Ht., mm	Base Dia., mm	Specs. Met	Pkg. Qty.		1-9	10-49	50-Up
18-8 Stainless Steel







				Style 1

				M3 × 0.5 mm	19.5	10	8	—	25	94545A210	000000	000000	000000


				M4 × 0.7 mm	21.5	10.3	9	DIN 315	10	94545A220	0000	0000	0000
				M5 × 0.8 mm	21.5	10.3	10.5	DIN 315	10	94545A225	0000	0000	0000
				M6 × 1 mm	26.3	12.7	13	DIN 315	10	94545A230	0000	0000	0000
				M8 × 1.25 mm	30.1	15.1	15.25	DIN 315	10	94545A235	0000	0000	0000
				M10 × 1.5 mm	34.9	18.3	18	DIN 315	5	94545A240	0000	0000	0000
				M12 × 1.75 mm	47.6	23.8	23	DIN 315	1	94545A245	0000	0000	0000
				M14 × 2 mm	58.3	28.5	26.6	DIN 315	1	94545A250	0000	0000	0000
				M16 × 2 mm	58.3	28.5	26.6	DIN 315	1	94545A255	00000	00000	00000
				M18 × 2.5 mm	68.5	33.8	29.5	DIN 315	1	94545A260	00000	00000	00000
				M20 × 2.5 mm	68.5	33.8	29.5	DIN 315	1	94545A265	00000	00000	00000


				Highly Corrosion-Resistant 316 Stainless Steel







								Style 1

								M3 × 0.5 mm	19.5	10	8	—	10	94543A320	00000	00000	00000


								M4 × 0.7 mm	19.5	10	8	—	10	94543A340	00000	00000	00000
								M5 × 0.8 mm	23	12	10.3	—	10	94543A360	00000	0000	0000
								M6 × 1 mm	26.3	12.7	13	DIN 315	5	94543A420	0000	0000	0000
								M8 × 1.25 mm	30.1	15.1	15.25	DIN 315	5	94543A440	0000	0000	0000
								M10 × 1.5 mm	34.93	18.3	18	DIN 315	1	94543A460	0000	0000	0000
								M12 × 1.75 mm	49.4	22.3	22.5	DIN 315	—	94543A520	0000	0000	0000
								M14 × 2 mm	52.7	30.8	26	DIN 315	—	94543A540	00000	00000	00000
								M16 × 2 mm	58.3	30.8	26.6	DIN 315	—	94543A560	00000	00000	00000

Plastic

Style 1

Nylon 6/6—These nuts thread on smoothly and resist abrasion to stand up to scratches and bumps. Nylon will swell and weaken when exposed to moisture, so it's best for dry environments.

								Pkg.
	Thread Size	Wd., mm	Ht., mm	Base Dia., mm	Choose a Color	Pkg. Qty.		1-9	10-49	50-Up
Nylon 6/6







				Style 1

				M4 × 0.7 mm	22.8	12.2	10.2	Black, Off-White	50	92124A510	00000	00000	00000


				M5 × 0.8 mm	22.8	12.2	10.2	Black, Off-White	50	92124A520	0000	0000	0000
				M6 × 1 mm	27.7	16	14.2	Black, Off-White	50	92124A530	00000	00000	0000
				M8 × 1.25 mm	34.8	18.3	16.2	Black, Off-White	50	92124A540	00000	00000	00000
				M10 × 1.5 mm	34.8	18.3	16.2	Black, Off-White	50	92124A550	00000	00000	00000
				M12 × 1.75 mm	42.2	22.7	21.4	Black, Off-White	25	92124A560	0000	0000	0000

Sanitary Spade-Head Thumb Nuts

Cover and protect threads in sanitary environments, such as food-processing and pharmaceutical plants. These thumb nuts have smooth surfaces, rounded edges, and no holes or gaps where bacteria could grow. Twist the spade head to tighten them by hand, without the need for tools that could scratch equipment.

Corrosion-Resistant Stainless Steel

Narrow

Profile

Standard Profile

Highly Corrosion-Resistant 316 Stainless Steel—Won't corrode from frequent washdowns and can stand up to the harshest cleaners and detergents.

Narrow Profile—Slimmer than standard-profile nuts to fit in tight spaces.

Standard Profile—The wide gripping area gives you more leverage than narrow-profile nuts, so you can apply more torque for a tighter fit.

	Base Dia., mm	Thread Dp., mm	Threading		Each
Highly Corrosion-Resistant 316 Stainless Steel







	Narrow Profile

	M4 × 0.7 mm	9	20	9	6	Partially Threaded	97080A160	000000


	M5 × 0.8 mm	10	22	10	6	Partially Threaded	97080A170	00000
	M6 × 1 mm	12	22	12	7	Partially Threaded	97080A180	00000
	M8 × 1.25 mm	16	25	16	9	Partially Threaded	97080A190	00000
	M10 × 1.5 mm	20	30	20	11	Partially Threaded	97080A210	00000




			Standard Profile

			M4 × 0.7 mm	20	19	10.8	6	Partially Threaded	97080A110	00000


			M5 × 0.8 mm	21	21	11.8	6	Partially Threaded	97080A120	00000
			M6 × 1 mm	25	25	14.2	7	Partially Threaded	97080A130	00000
			M8 × 1.25 mm	33	33	18	9	Partially Threaded	97080A140	00000
			M10 × 1.5 mm	40	40	22.3	11	Partially Threaded	97080A150	00000