Class 12 Nuts | McMaster-Carr

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17 Products

Hex Nuts

The most commonly used hex nuts, these are suitable for fastening most machinery and equipment.

Extreme-Strength Steel

Rated Grade 9 or Class 12, these nuts are about 20% stronger than high-strength steel nuts. They are strong enough to secure components in heavy machinery, such as bulldozers and excavators. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

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

	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Steel


	M6 × 1 mm	10	5	ISO Class 12	DIN 934	50	000000000	000000
	M8 × 1.25 mm	13	6.5	ISO Class 12	DIN 934	25	000000000	00000
	M10 × 1.5 mm	17	8	ISO Class 12	DIN 934	10	000000000	0000
	M12 × 1.75 mm	19	10	ISO Class 12	DIN 934	10	000000000	00000
	M14 × 2 mm	22	11	ISO Class 12	DIN 934	1	000000000	0000
	M16 × 2 mm	24	13	ISO Class 12	DIN 934	5	000000000	00000
	M18 × 2.5 mm	27	15	ISO Class 12	DIN 934	1	000000000	0000
	M20 × 2.5 mm	30	16	ISO Class 12	DIN 934	5	000000000	00000
	M24 × 3 mm	36	19	ISO Class 12	DIN 934	1	000000000	0000
	M27 × 3 mm	41	22	ISO Class 12	DIN 934	1	000000000	00000
	M30 × 3.5 mm	46	24	ISO Class 12	DIN 934	1	000000000	00000
	M33 × 3.5 mm	50	26	ISO Class 12	DIN 934	1	000000000	00000
	M36 × 4 mm	55	29	ISO Class 12	DIN 934	1	000000000	00000
	M39 × 4 mm	60	31	ISO Class 12	DIN 934	1	000000000	00000
	M42 × 4.5 mm	65	34	ISO Class 12	DIN 934	1	000000000	00000
	M45 × 4.5 mm	70	36	ISO Class 12	DIN 934	1	000000000	00000
	M48 × 5 mm	75	38	ISO Class 12	DIN 934	1	000000000	00000