DIN 985 Nuts | McMaster-Carr

Filter by

Specifications Met

System of Measurement

Thread Size

Nut Type

Thread Pitch

Material

Locking Type

Finish

Corrosion-Resistant Coated

Zinc Plated

Zinc Yellow-Chromate Plated

Hex Nut Profile

Height

Thread Type

Fastener Strength Grade/Class

Thread Spacing

Width

Performance

Fastener Strength Rating

Thread Direction

Color

Insert Maximum Temperature

Thread Fit

Drive Style

RoHS

REACH

Sold As

DFARS Specialty Metals

Exempt

Not Compliant

Export Control Classification Number (ECCN)

EAR99

Forward

How can we improve?

153 Products

Nylon-Insert Locknuts

Versatile yet economical, these are the most commonly used locknuts. The nylon insert grips the screw to prevent loosening from moderate vibration without damaging threads. However, the insert may become brittle if exposed to high temperatures. These locknuts are reusable a handful of times, but the holding power decreases with each use.

High-Strength Steel

Image of Product. Front orientation. Locknuts. Nylon-Insert Locknuts.

Rated Grade 8, Grade C, or Class 10, these locknuts are about 25% stronger than medium-strength steel nuts. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

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

Black-Corrosion-Resistant-Coated Steel—These nuts combine a finished appearance with the rust resistance of stainless steel. The coating has been tested to extreme standards, including 1,000 hours of salt spray resistance, to hold up in wet and outdoor environments. Also known as black luster.

	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Insert Max. Temp., ° F	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M4 × 0.7 mm	7	5	ISO Class 10	220	DIN 985	100	000000000	000000


	M5 × 0.8 mm	8	5	ISO Class 10	220	DIN 985	100	000000000	00000
	M6 × 1 mm	10	6	ISO Class 10	220	DIN 985	100	000000000	00000
	M8 × 1 mm	13	8	ISO Class 10	220	DIN 985, ISO 10511	10	000000000	00000
	M8 × 1.25 mm	13	8	ISO Class 10	220	DIN 985	50	000000000	00000
	M10 × 1 mm	17	10	ISO Class 10	220	DIN 985, ISO 10511	25	000000000	00000
	M10 × 1.25 mm	17	10	ISO Class 10	220	DIN 985, ISO 10511	10	000000000	00000
	M10 × 1.5 mm	17	10	ISO Class 10	220	DIN 985	25	000000000	00000
	M12 × 1.25 mm	19	12	ISO Class 10	220	DIN 985, ISO 10511	10	000000000	00000
	M12 × 1.5 mm	19	12	ISO Class 10	220	DIN 985, ISO 10511	10	000000000	00000
	M12 × 1.75 mm	19	12	ISO Class 10	220	DIN 985	10	000000000	00000


	M14 × 1.5 mm	22	14	ISO Class 10	220	DIN 985, ISO 10511	5	000000000	00000
	M14 × 2 mm	22	14	ISO Class 10	220	DIN 985	10	000000000	00000
	M16 × 1.5 mm	24	16	ISO Class 10	220	DIN 985, ISO 10511	1	000000000	0000
	M16 × 2 mm	24	16	ISO Class 10	220	DIN 985	10	000000000	00000
	M18 × 1.5 mm	27	18	ISO Class 10	220	DIN 985, ISO 10511	1	000000000	0000
	M18 × 2.5 mm	27	18.5	ISO Class 10	220	DIN 985	5	000000000	00000
	M20 × 1.5 mm	30	20	ISO Class 10	220	DIN 985, ISO 10511	1	000000000	0000
	M20 × 2 mm	30	20	ISO Class 10	220	DIN 985, ISO 10511	1	000000000	00000
	M20 × 2.5 mm	30	20	ISO Class 10	220	DIN 985	5	000000000	00000
	M22 × 1.5 mm	32	22	ISO Class 10	220	DIN 985, ISO 10511	1	000000000	00000


	M22 × 2.5 mm	32	22	ISO Class 10	220	DIN 985	1	000000000	0000
	M24 × 1.5 mm	36	24	ISO Class 10	220	DIN 985, ISO 10511	1	000000000	00000
	M24 × 2 mm	36	24	ISO Class 10	220	DIN 985, ISO 10511	1	000000000	00000
	M24 × 3 mm	36	24	ISO Class 10	220	DIN 985	1	000000000	0000
	M27 × 3 mm	41	27	ISO Class 10	220	DIN 985	1	000000000	00000
	M30 × 2 mm	46	30	ISO Class 10	220	DIN 985, ISO 10511	1	000000000	00000
	M30 × 3.5 mm	46	30	ISO Class 10	220	DIN 985	1	000000000	00000
	M33 × 3.5 mm	50	33	ISO Class 10	220	DIN 985	1	000000000	00000
	M36 × 3 mm	55	36	ISO Class 10	220	DIN 985, ISO 10511	1	000000000	00000
	M36 × 4 mm	55	36	ISO Class 10	220	DIN 985	1	000000000	00000


	M39 × 4 mm	60	39	ISO Class 10	220	DIN 985	1	000000000	00000
	M42 × 4.5 mm	65	42	ISO Class 10	220	DIN 985	1	000000000	00000


	Black-Corrosion-Resistant-Coated Steel



			M4 × 0.7 mm	7	5	ISO Class 10	220	DIN 985	5	000000000	00000


			M5 × 0.8 mm	8	5	ISO Class 10	220	DIN 985	5	000000000	00000
			M6 × 1 mm	10	6	ISO Class 10	220	DIN 985	5	000000000	00000
			M8 × 1.25 mm	13	8	ISO Class 10	220	DIN 985	5	000000000	00000
			M10 × 1.5 mm	17	10	ISO Class 10	220	DIN 985	5	000000000	00000
			M12 × 1.75 mm	19	12	ISO Class 10	220	DIN 985	1	000000000	0000
			M14 × 2 mm	22	14	ISO Class 10	220	DIN 985	1	000000000	0000

Medium-Strength Steel

These Grade 5 or Class 8 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.

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

	Thread Size	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Insert Max. Temp., ° F	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Yellow-Chromate-Plated Steel



		M3 × 0.5 mm	5.5	4	ISO Class 8	220	DIN 985, ISO 10511	100	000000000	00000


		M4 × 0.7 mm	7	5	ISO Class 8	220	DIN 985, ISO 10511	100	000000000	00000
		M5 × 0.8 mm	8	5	ISO Class 8	220	DIN 985, ISO 10511	100	000000000	00000
		M6 × 1 mm	10	6	ISO Class 8	220	DIN 985, ISO 10511	100	000000000	00000
		M8 × 1.25 mm	13	8	ISO Class 8	220	DIN 985, ISO 10511	100	000000000	0000
		M10 × 1.5 mm	17	10	ISO Class 8	220	DIN 985, ISO 10511	50	000000000	00000
		M12 × 1.75 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	25	000000000	00000
		M14 × 2 mm	22	14	ISO Class 8	220	DIN 985, ISO 10511	25	000000000	00000
		M16 × 2 mm	24	16	ISO Class 8	220	DIN 985, ISO 10511	10	000000000	0000
		M18 × 2.5 mm	27	18.5	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	0000
		M20 × 2.5 mm	30	20	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	0000


		M22 × 2.5 mm	32	22	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	0000
		M24 × 3 mm	36	24	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	00000


		Zinc-Plated Steel



				M2 × 0.4 mm	4	2.8	ISO Class 8	220	DIN 985	10	000000000	0000


				M2.5 × 0.45 mm	5	3.8	ISO Class 8	220	DIN 985	50	000000000	0000
				M3 × 0.5 mm	5.5	4	ISO Class 8	220	DIN 985, ISO 10511	100	000000000	0000
				M4 × 0.7 mm	7	5	ISO Class 8	220	DIN 985, ISO 10511	100	000000000	0000
				M5 × 0.8 mm	8	5	ISO Class 8	220	DIN 985, ISO 10511	100	000000000	0000
				M6 × 1 mm	10	6	ISO Class 8	220	DIN 985, ISO 10511	100	000000000	0000
				M7 × 1 mm	11	7.5	ISO Class 8	220	DIN 985, ISO 10511	25	000000000	0000
				M8 × 1 mm	13	8	ISO Class 8	220	DIN 985, ISO 10511	25	000000000	0000
				M8 × 1.25 mm	13	8	ISO Class 8	220	DIN 985, ISO 10511	100	000000000	00000
				M10 × 1 mm	17	10	ISO Class 8	220	DIN 985, ISO 10511	25	000000000	0000
				M10 × 1.25 mm	17	10	ISO Class 8	220	DIN 985, ISO 10511	25	000000000	00000


				M10 × 1.5 mm	17	10	ISO Class 8	220	DIN 985, ISO 10511	50	000000000	0000
				M12 × 1 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	10	000000000	0000
				M12 × 1.25 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	25	000000000	00000
				M12 × 1.5 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	20	000000000	00000
				M12 × 1.75 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	50	000000000	00000
				M14 × 1.5 mm	22	14	ISO Class 8	220	DIN 985, ISO 10511	10	000000000	0000
				M14 × 2 mm	22	14	ISO Class 8	220	DIN 985, ISO 10511	25	000000000	00000
				M16 × 1.5 mm	24	16	ISO Class 8	220	DIN 985, ISO 10511	10	000000000	0000
				M16 × 2 mm	24	16	ISO Class 8	220	DIN 985, ISO 10511	25	000000000	00000
				M18 × 1.5 mm	27	18.5	ISO Class 8	220	DIN 985, ISO 10511	10	000000000	00000


				M18 × 2.5 mm	27	18.5	ISO Class 8	220	DIN 985, ISO 10511	10	000000000	00000
				M20 × 1.5 mm	30	20	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	0000
				M20 × 2 mm	30	20	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	0000
				M20 × 2.5 mm	30	20	ISO Class 8	220	DIN 985, ISO 10511	10	000000000	00000
				M22 × 1.5 mm	32	22	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	00000
				M22 × 2.5 mm	32	22	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	00000
				M24 × 1.5 mm	36	24	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	0000
				M24 × 2 mm	36	24	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	0000
				M24 × 3 mm	36	24	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	00000
				M27 × 1.5 mm	41	27	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	0000


M27 × 2 mm	41			27	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	0000
M27 × 3 mm	41			27	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	0000
M30 × 2 mm	46			30	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000
M30 × 3.5 mm	46			30	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	0000
M33 × 2 mm	50			33	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000
M33 × 3.5 mm	50			33	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000
M36 × 3 mm	55			36	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000
M36 × 4 mm	55			36	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000
M39 × 3 mm	60			39	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000
M42 × 3 mm	65			42	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000


M45 × 3 mm	70			45	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000
M48 × 3 mm	75			48	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000
M48 × 5 mm	75			48	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000


Black-Corrosion-Resistant-Coated Steel



				M4 × 0.7 mm	7	5	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	00000


		M5 × 0.8 mm	8	5	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	00000
		M6 × 1 mm	10	6	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	00000
		M8 × 1.25 mm	13	8	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	00000
		M10 × 1.5 mm	17	10	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	00000
		M12 × 1.75 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	0000
		M14 × 2 mm	22	14	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	0000

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these locknuts 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.

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

	Thread Size	Wd., mm	Ht., mm	Insert Max. Temp., ° F	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



		M2 × 0.4 mm	4	2.8	220	DIN 985	10	000000000	00000


		M2.5 × 0.45 mm	5	3.8	220	DIN 985	25	000000000	0000
		M3 × 0.5 mm	5.5	4	220	DIN 985	100	000000000	0000
		M4 × 0.7 mm	7	5	220	DIN 985	100	000000000	0000
		M5 × 0.8 mm	8	5	220	DIN 985	100	000000000	0000
		M6 × 1 mm	10	6	220	DIN 985	100	000000000	0000
		M8 × 1 mm	13	8	220	DIN 985	5	000000000	00000
		M8 × 1.25 mm	13	8	220	DIN 985	50	000000000	0000
		M10 × 1 mm	17	10	220	DIN 985	5	000000000	00000
		M10 × 1.5 mm	17	10	220	DIN 985	10	000000000	0000
		M12 × 1.5 mm	19	12	220	DIN 985	1	000000000	0000


		M12 × 1.75 mm	19	12	220	DIN 985	10	000000000	0000
		M14 × 1.5 mm	22	14	220	DIN 985	1	000000000	0000
		M14 × 2 mm	22	14	220	DIN 985	5	000000000	00000
		M16 × 1.5 mm	24	16	220	DIN 985	1	000000000	0000
		M16 × 2 mm	24	16	220	DIN 985	5	000000000	0000
		M18 × 1.5 mm	27	18	220	DIN 985	1	000000000	00000
		M18 × 2.5 mm	27	18.5	220	DIN 985	1	000000000	0000
		M20 × 1.5 mm	30	20	220	DIN 985	1	000000000	00000
		M20 × 2.5 mm	30	20	220	DIN 985	1	000000000	0000
		M22 × 2.5 mm	32	22	220	DIN 985	1	000000000	0000


		M24 × 3 mm	36	24	220	DIN 985	1	000000000	00000
		M27 × 3 mm	41	27	220	DIN 985	1	000000000	00000
		M30 × 3.5 mm	46	30	220	DIN 985	1	000000000	00000


		Black-Oxide 18-8 Stainless Steel



				M2 × 0.4 mm	4	3	240	DIN 985	5	000000000	0000


				M2.5 × 0.45 mm	5	3.8	240	DIN 985	10	000000000	0000
				M3 × 0.5 mm	5.5	4	240	DIN 985	10	000000000	0000
				M4 × 0.7 mm	7	5	240	DIN 985	10	000000000	0000
				M5 × 0.8 mm	8	5	240	DIN 985	10	000000000	0000
				M6 × 1 mm	10	6	240	DIN 985	10	000000000	0000
				M8 × 1.25 mm	13	8	240	DIN 985	10	000000000	0000
				M10 × 1.5 mm	17	10	240	DIN 985	10	000000000	00000
				M12 × 1.75 mm	19	12	240	DIN 985	5	000000000	0000


				316 Stainless Steel



						M2.5 × 0.45 mm	5	3.8	220	DIN 985	50	000000000	0000


						M3 × 0.5 mm	5.5	4	220	DIN 985	50	000000000	0000
						M4 × 0.7 mm	7	5	220	DIN 985	50	000000000	0000
						M5 × 0.8 mm	8	5	220	DIN 985	50	000000000	0000
						M6 × 1 mm	10	6	220	DIN 985	50	000000000	00000
						M8 × 1.25 mm	13	8	220	DIN 985	25	000000000	0000
M10 × 1.5 mm						17	10	220	DIN 985	10	000000000	00000
M12 × 1.75 mm	19					12	220	DIN 985	10	000000000	00000
M14 × 2 mm	22					14	220	DIN 985	1	000000000	0000
M16 × 2 mm	24					16	220	DIN 985	5	000000000	00000
M18 × 2.5 mm	27					18.5	220	DIN 985	1	000000000	00000


M20 × 2.5 mm	30					20	220	DIN 985	1	000000000	0000
M22 × 2.5 mm	32					22	220	DIN 985	1	000000000	0000
M24 × 3 mm	36					24	220	DIN 985	1	000000000	00000
M27 × 3 mm	41					27	220	DIN 985	1	000000000	00000
M30 × 3.5 mm	46					30	220	DIN 985	1	000000000	00000