DIN 557 Nuts | McMaster-Carr

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DIN 557

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ISO Class 5

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26 Products

Low-Strength Steel Square Nuts

Large flat sides make these nuts easy to grip with a wrench and keep them from rotating in channels and square holes. About half the strength of medium-strength steel square nuts, use them in light duty fastening applications, such as securing access panels.

Black-Zinc-Plated Steel—Black-zinc-plated steel square nuts resist corrosion in wet environments and have a black finish that blends in with dark surfaces.

Steel—Steel square nuts are best for dry environments, since moisture will cause them to rust.

Zinc-Plated Steel—Zinc-plated steel square nuts resist corrosion in wet environments.

	Wd., mm	Ht., mm	Specs. Met	Pkg. Qty.		Pkg.
Steel—ISO Class 5



	M4 × 0.7 mm	7	3	DIN 557	50	000000000	00000


	M5 × 0.8 mm	8	4	DIN 557	50	000000000	00000
	M6 × 1 mm	10	5	DIN 557	25	000000000	0000
	M8 × 1.25 mm	13	6.5	DIN 557	25	000000000	0000
	M10 × 1.5 mm	17	8	DIN 557	10	000000000	0000
	M12 × 1.75 mm	19	10	DIN 557	5	000000000	0000


	Zinc-Plated Steel—ISO Class 5



			M4 × 0.7 mm	7	3.2	DIN 557	100	000000000	00000


			M5 × 0.8 mm	8	4	DIN 557	100	000000000	00000
			M6 × 1 mm	10	5	DIN 557	100	000000000	00000
			M8 × 1.25 mm	13	6.5	DIN 557	25	000000000	0000
			M10 × 1.5 mm	17	8	DIN 557	25	000000000	00000
			M12 × 1.75 mm	19	10	DIN 557	10	000000000	0000
			M16 × 2 mm	24	13	DIN 557	5	000000000	00000
			M20 × 2.5 mm	30	16	DIN 557	5	000000000	00000


			Black-Zinc-Plated Steel—ISO Class 5



					M4 × 0.7 mm	7	3	DIN 557	25	000000000	0000


					M5 × 0.8 mm	8	4	DIN 557	25	000000000	0000
					M6 × 1 mm	10	5	DIN 557	25	000000000	0000
					M8 × 1.25 mm	13	6.5	DIN 557	10	000000000	0000
					M10 × 1.5 mm	17	8	DIN 557	10	000000000	00000
					M16 × 2 mm	24	13	DIN 557	1	000000000	0000

18-8 Stainless Steel Square Nuts

These square nuts have good chemical resistance and may be mildly magnetic. Large flat sides make them easy to grip with a wrench and keep them from rotating in channels and square holes.

	Wd., mm	Ht., mm	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M5 × 0.8 mm	8	4	DIN 557	50	000000000	00000


	M6 × 1 mm	10	5	DIN 557	50	000000000	00000
	M8 × 1.25 mm	13	6.5	DIN 557	25	000000000	00000
	M10 × 1.5 mm	17	8	DIN 557	10	000000000	0000
	M12 × 1.75 mm	19	10	DIN 557	5	000000000	00000
	M16 × 2 mm	24	13	DIN 557	1	000000000	00000