DIN 985 Nuts | McMaster-Carr

Filter by

Specifications Met

System of Measurement

Thread Size

Nut Type

Material

Locking Type

Thread Pitch

Finish

Height

Hex Nut Profile

Fastener Strength Grade/Class

Width

Thread Spacing

Drive Style

Thread Type

Thread Direction

Insert Maximum Temperature

Thread Fit

RoHS Compliance

REACH Compliance

Color

DFARS Compliance

Fastener Strength Rating

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.

	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	000000
	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	00000
	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	00000
	M18 × 2.5 mm	27	18.5	ISO Class 8	220	DIN 985, ISO 10511	5	000000000	00000
	M20 × 2.5 mm	30	20	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 × 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	00000
			M2.5 × 0.45 mm	5	3.8	ISO Class 8	220	DIN 985	50	000000000	00000
			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	00000
			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	00000
			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	00000
			M12 × 1 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	10	000000000	00000
			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	00000
			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	00000
			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	00000
			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	00000
			M27 × 2 mm	41	27	ISO Class 8	220	DIN 985, ISO 10511	1	000000000	00000
			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	00000
			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.

	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	00000
	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