DIN 985 Nuts | McMaster-Carr

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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	94645A101	000000
	M5 × 0.8 mm	8	5	ISO Class 10	220	DIN 985	100	94645A102	00000
	M6 × 1 mm	10	6	ISO Class 10	220	DIN 985	100	94645A205	00000
	M8 × 1 mm	13	8	ISO Class 10	220	DIN 985, ISO 10511	10	94645A111	00000
	M8 × 1.25 mm	13	8	ISO Class 10	220	DIN 985	50	94645A210	00000
	M10 × 1 mm	17	10	ISO Class 10	220	DIN 985, ISO 10511	25	94645A213	00000
	M10 × 1.25 mm	17	10	ISO Class 10	220	DIN 985, ISO 10511	10	94645A112	00000
	M10 × 1.5 mm	17	10	ISO Class 10	220	DIN 985	25	94645A220	00000
	M12 × 1.25 mm	19	12	ISO Class 10	220	DIN 985, ISO 10511	10	94645A113	00000
	M12 × 1.5 mm	19	12	ISO Class 10	220	DIN 985, ISO 10511	10	94645A229	00000
	M12 × 1.75 mm	19	12	ISO Class 10	220	DIN 985	10	94645A230	00000
	M14 × 1.5 mm	22	14	ISO Class 10	220	DIN 985, ISO 10511	5	94645A115	00000
	M14 × 2 mm	22	14	ISO Class 10	220	DIN 985	10	94645A240	00000
	M16 × 1.5 mm	24	16	ISO Class 10	220	DIN 985, ISO 10511	1	94645A116	0000
	M16 × 2 mm	24	16	ISO Class 10	220	DIN 985	10	94645A250	00000
	M18 × 1.5 mm	27	18	ISO Class 10	220	DIN 985, ISO 10511	1	94645A117	0000
	M18 × 2.5 mm	27	18.5	ISO Class 10	220	DIN 985	5	94645A260	00000
	M20 × 1.5 mm	30	20	ISO Class 10	220	DIN 985, ISO 10511	1	94645A118	0000
	M20 × 2 mm	30	20	ISO Class 10	220	DIN 985, ISO 10511	1	94645A119	00000
	M20 × 2.5 mm	30	20	ISO Class 10	220	DIN 985	5	94645A270	00000
	M22 × 1.5 mm	32	22	ISO Class 10	220	DIN 985, ISO 10511	1	94645A121	00000
	M22 × 2.5 mm	32	22	ISO Class 10	220	DIN 985	1	94645A310	0000
	M24 × 1.5 mm	36	24	ISO Class 10	220	DIN 985, ISO 10511	1	94645A122	00000
	M24 × 2 mm	36	24	ISO Class 10	220	DIN 985, ISO 10511	1	94645A123	00000
	M24 × 3 mm	36	24	ISO Class 10	220	DIN 985	1	94645A280	0000
	M27 × 3 mm	41	27	ISO Class 10	220	DIN 985	1	94645A320	00000
	M30 × 2 mm	46	30	ISO Class 10	220	DIN 985, ISO 10511	1	94645A124	00000
	M30 × 3.5 mm	46	30	ISO Class 10	220	DIN 985	1	94645A330	00000
	M33 × 3.5 mm	50	33	ISO Class 10	220	DIN 985	1	94645A340	00000
	M36 × 3 mm	55	36	ISO Class 10	220	DIN 985, ISO 10511	1	94645A125	00000
	M36 × 4 mm	55	36	ISO Class 10	220	DIN 985	1	94645A350	00000
	M39 × 4 mm	60	39	ISO Class 10	220	DIN 985	1	94645A360	00000
	M42 × 4.5 mm	65	42	ISO Class 10	220	DIN 985	1	94645A370	00000

	Black-Corrosion-Resistant-Coated Steel


			M4 × 0.7 mm	7	5	ISO Class 10	220	DIN 985	5	90237A110	00000
			M5 × 0.8 mm	8	5	ISO Class 10	220	DIN 985	5	90237A120	00000
			M6 × 1 mm	10	6	ISO Class 10	220	DIN 985	5	90237A130	00000
			M8 × 1.25 mm	13	8	ISO Class 10	220	DIN 985	5	90237A140	00000
			M10 × 1.5 mm	17	10	ISO Class 10	220	DIN 985	5	90237A150	00000
			M12 × 1.75 mm	19	12	ISO Class 10	220	DIN 985	1	90237A160	0000
			M14 × 2 mm	22	14	ISO Class 10	220	DIN 985	1	90237A170	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	90576A811	000000
	M4 × 0.7 mm	7	5	ISO Class 8	220	DIN 985, ISO 10511	100	90576A812	00000
	M5 × 0.8 mm	8	5	ISO Class 8	220	DIN 985, ISO 10511	100	90576A813	00000
	M6 × 1 mm	10	6	ISO Class 8	220	DIN 985, ISO 10511	100	90576A814	00000
	M8 × 1.25 mm	13	8	ISO Class 8	220	DIN 985, ISO 10511	100	90576A815	00000
	M10 × 1.5 mm	17	10	ISO Class 8	220	DIN 985, ISO 10511	50	90576A816	00000
	M12 × 1.75 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	25	90576A817	00000
	M14 × 2 mm	22	14	ISO Class 8	220	DIN 985, ISO 10511	25	90576A818	00000
	M16 × 2 mm	24	16	ISO Class 8	220	DIN 985, ISO 10511	10	90576A819	00000
	M18 × 2.5 mm	27	18.5	ISO Class 8	220	DIN 985, ISO 10511	5	90576A821	00000
	M20 × 2.5 mm	30	20	ISO Class 8	220	DIN 985, ISO 10511	5	90576A822	00000
	M22 × 2.5 mm	32	22	ISO Class 8	220	DIN 985, ISO 10511	5	90576A823	00000
	M24 × 3 mm	36	24	ISO Class 8	220	DIN 985, ISO 10511	5	90576A824	00000

	Zinc-Plated Steel


			M2 × 0.4 mm	4	2.8	ISO Class 8	220	DIN 985	10	90576A211	00000
			M2.5 × 0.45 mm	5	3.8	ISO Class 8	220	DIN 985	50	90576A161	00000
			M3 × 0.5 mm	5.5	4	ISO Class 8	220	DIN 985, ISO 10511	100	90576A102	0000
			M4 × 0.7 mm	7	5	ISO Class 8	220	DIN 985, ISO 10511	100	90576A103	0000
			M5 × 0.8 mm	8	5	ISO Class 8	220	DIN 985, ISO 10511	100	90576A104	0000
			M6 × 1 mm	10	6	ISO Class 8	220	DIN 985, ISO 10511	100	90576A115	0000
			M7 × 1 mm	11	7.5	ISO Class 8	220	DIN 985, ISO 10511	25	90576A212	00000
			M8 × 1 mm	13	8	ISO Class 8	220	DIN 985, ISO 10511	25	90576A116	0000
			M8 × 1.25 mm	13	8	ISO Class 8	220	DIN 985, ISO 10511	100	90576A117	00000
			M10 × 1 mm	17	10	ISO Class 8	220	DIN 985, ISO 10511	25	90576A131	00000
			M10 × 1.25 mm	17	10	ISO Class 8	220	DIN 985, ISO 10511	25	90576A132	00000
			M10 × 1.5 mm	17	10	ISO Class 8	220	DIN 985, ISO 10511	50	90576A118	00000
			M12 × 1 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	10	90576A137	00000
			M12 × 1.25 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	25	90576A141	00000
			M12 × 1.5 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	20	90576A144	00000
			M12 × 1.75 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	50	90576A119	00000
			M14 × 1.5 mm	22	14	ISO Class 8	220	DIN 985, ISO 10511	10	90576A147	00000
			M14 × 2 mm	22	14	ISO Class 8	220	DIN 985, ISO 10511	25	90576A120	00000
			M16 × 1.5 mm	24	16	ISO Class 8	220	DIN 985, ISO 10511	10	90576A152	00000
			M16 × 2 mm	24	16	ISO Class 8	220	DIN 985, ISO 10511	25	90576A122	00000
			M18 × 1.5 mm	27	18.5	ISO Class 8	220	DIN 985, ISO 10511	10	90576A106	00000
			M18 × 2.5 mm	27	18.5	ISO Class 8	220	DIN 985, ISO 10511	10	90576A123	00000
			M20 × 1.5 mm	30	20	ISO Class 8	220	DIN 985, ISO 10511	5	90576A172	00000
			M20 × 2 mm	30	20	ISO Class 8	220	DIN 985, ISO 10511	1	90576A155	0000
			M20 × 2.5 mm	30	20	ISO Class 8	220	DIN 985, ISO 10511	10	90576A125	00000
			M22 × 1.5 mm	32	22	ISO Class 8	220	DIN 985, ISO 10511	5	90576A299	00000
			M22 × 2.5 mm	32	22	ISO Class 8	220	DIN 985, ISO 10511	5	90576A162	00000
			M24 × 1.5 mm	36	24	ISO Class 8	220	DIN 985, ISO 10511	1	90576A326	0000
			M24 × 2 mm	36	24	ISO Class 8	220	DIN 985, ISO 10511	1	90576A304	0000
			M24 × 3 mm	36	24	ISO Class 8	220	DIN 985, ISO 10511	5	90576A129	00000
			M27 × 1.5 mm	41	27	ISO Class 8	220	DIN 985, ISO 10511	1	90576A352	00000
			M27 × 2 mm	41	27	ISO Class 8	220	DIN 985, ISO 10511	1	90576A342	00000
			M27 × 3 mm	41	27	ISO Class 8	220	DIN 985, ISO 10511	1	90576A140	00000
			M30 × 2 mm	46	30	ISO Class 8	220	DIN 985, ISO 10511	1	90576A366	00000
			M30 × 3.5 mm	46	30	ISO Class 8	220	DIN 985, ISO 10511	1	90576A150	00000
			M33 × 2 mm	50	33	ISO Class 8	220	DIN 985, ISO 10511	1	90576A384	00000
			M33 × 3.5 mm	50	33	ISO Class 8	220	DIN 985, ISO 10511	1	90576A163	00000
			M36 × 3 mm	55	36	ISO Class 8	220	DIN 985, ISO 10511	1	90576A452	00000
			M36 × 4 mm	55	36	ISO Class 8	220	DIN 985, ISO 10511	1	90576A164	00000
			M39 × 3 mm	60	39	ISO Class 8	220	DIN 985, ISO 10511	1	90576A523	00000
			M42 × 3 mm	65	42	ISO Class 8	220	DIN 985, ISO 10511	1	90576A531	00000
			M45 × 3 mm	70	45	ISO Class 8	220	DIN 985, ISO 10511	1	90576A544	00000
			M48 × 3 mm	75	48	ISO Class 8	220	DIN 985, ISO 10511	1	90576A726	00000
			M48 × 5 mm	75	48	ISO Class 8	220	DIN 985, ISO 10511	1	90576A166	00000

Black-Corrosion-Resistant-Coated Steel


			M4 × 0.7 mm	7	5	ISO Class 8	220	DIN 985, ISO 10511	5	90819A111	00000
			M5 × 0.8 mm	8	5	ISO Class 8	220	DIN 985, ISO 10511	5	90819A112	00000
			M6 × 1 mm	10	6	ISO Class 8	220	DIN 985, ISO 10511	5	90819A113	00000
			M8 × 1.25 mm	13	8	ISO Class 8	220	DIN 985, ISO 10511	5	90819A114	00000
			M10 × 1.5 mm	17	10	ISO Class 8	220	DIN 985, ISO 10511	5	90819A115	00000
			M12 × 1.75 mm	19	12	ISO Class 8	220	DIN 985, ISO 10511	1	90819A116	0000
			M14 × 2 mm	22	14	ISO Class 8	220	DIN 985, ISO 10511	1	90819A117	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	93625A101	00000
	M2.5 × 0.45 mm	5	3.8	220	DIN 985	25	93625A103	0000
	M3 × 0.5 mm	5.5	4	220	DIN 985	100	93625A100	0000
	M4 × 0.7 mm	7	5	220	DIN 985	100	93625A150	0000
	M5 × 0.8 mm	8	5	220	DIN 985	100	93625A200	0000
	M6 × 1 mm	10	6	220	DIN 985	100	93625A250	0000
	M8 × 1 mm	13	8	220	DIN 985	5	93625A110	00000
	M8 × 1.25 mm	13	8	220	DIN 985	50	93625A300	0000
	M10 × 1 mm	17	10	220	DIN 985	5	93625A120	00000
	M10 × 1.5 mm	17	10	220	DIN 985	10	93625A350	0000
	M12 × 1.5 mm	19	12	220	DIN 985	1	93625A130	0000
	M12 × 1.75 mm	19	12	220	DIN 985	10	93625A400	0000
	M14 × 1.5 mm	22	14	220	DIN 985	1	93625A140	0000
	M14 × 2 mm	22	14	220	DIN 985	5	93625A450	00000
	M16 × 1.5 mm	24	16	220	DIN 985	1	93625A160	0000
	M16 × 2 mm	24	16	220	DIN 985	5	93625A500	0000
	M18 × 1.5 mm	27	18	220	DIN 985	1	93625A170	00000
	M18 × 2.5 mm	27	18.5	220	DIN 985	1	93625A510	0000
	M20 × 1.5 mm	30	20	220	DIN 985	1	93625A180	00000
	M20 × 2.5 mm	30	20	220	DIN 985	1	93625A550	0000
	M22 × 2.5 mm	32	22	220	DIN 985	1	93625A760	0000
	M24 × 3 mm	36	24	220	DIN 985	1	93625A600	00000
	M27 × 3 mm	41	27	220	DIN 985	1	93625A700	00000
	M30 × 3.5 mm	46	30	220	DIN 985	1	93625A750	00000

	Black-Oxide 18-8 Stainless Steel


			M2 × 0.4 mm	4	3	240	DIN 985	5	93625A221	0000
			M2.5 × 0.45 mm	5	3.8	240	DIN 985	10	93625A222	0000
			M3 × 0.5 mm	5.5	4	240	DIN 985	10	93625A223	0000
			M4 × 0.7 mm	7	5	240	DIN 985	10	93625A224	0000
			M5 × 0.8 mm	8	5	240	DIN 985	10	93625A225	0000
			M6 × 1 mm	10	6	240	DIN 985	10	93625A226	0000
			M8 × 1.25 mm	13	8	240	DIN 985	10	93625A227	0000
			M10 × 1.5 mm	17	10	240	DIN 985	10	93625A228	00000
			M12 × 1.75 mm	19	12	240	DIN 985	5	93625A229	0000

			316 Stainless Steel


					M2.5 × 0.45 mm	5	3.8	220	DIN 985	50	94205A101	0000
					M3 × 0.5 mm	5.5	4	220	DIN 985	50	94205A220	0000
					M4 × 0.7 mm	7	5	220	DIN 985	50	94205A230	0000
					M5 × 0.8 mm	8	5	220	DIN 985	50	94205A240	0000
					M6 × 1 mm	10	6	220	DIN 985	50	94205A250	00000
					M8 × 1.25 mm	13	8	220	DIN 985	25	94205A260	0000
					M10 × 1.5 mm	17	10	220	DIN 985	10	94205A270	00000
					M12 × 1.75 mm	19	12	220	DIN 985	10	94205A280	00000
					M14 × 2 mm	22	14	220	DIN 985	1	94205A290	0000
					M16 × 2 mm	24	16	220	DIN 985	5	94205A310	00000
					M18 × 2.5 mm	27	18.5	220	DIN 985	1	94205A315	00000
					M20 × 2.5 mm	30	20	220	DIN 985	1	94205A320	0000
					M22 × 2.5 mm	32	22	220	DIN 985	1	94205A111	0000
					M24 × 3 mm	36	24	220	DIN 985	1	94205A330	00000
					M27 × 3 mm	41	27	220	DIN 985	1	94205A350	00000
					M30 × 3.5 mm	46	30	220	DIN 985	1	94205A380	00000