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About Nuts, Materials, and Finishes
More
Metric Extreme-Strength Steel Hex Nuts—Class 12

Class 12 nuts are comparable in strength to Class 12.9 bolts. They're about 20% stronger than high-strength steel nuts and often used in heavy machinery, such as earth-moving equipment.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||
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Size | Pitch, mm | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Steel—Class 12 | |||||||
M6 | 1 | 10 | 5 | DIN 934 | 50 | 000000000 | 000000 |
M8 | 1.25 | 13 | 6.5 | DIN 934 | 25 | 000000000 | 0000 |
M10 | 1.5 | 17 | 8 | DIN 934 | 10 | 000000000 | 0000 |
M12 | 1.75 | 19 | 10 | DIN 934 | 10 | 000000000 | 00000 |
M14 | 2 | 22 | 11 | DIN 934 | 1 | 000000000 | 0000 |
M16 | 2 | 24 | 13 | DIN 934 | 5 | 000000000 | 00000 |
M18 | 2.5 | 27 | 15 | DIN 934 | 1 | 000000000 | 0000 |
M20 | 2.5 | 30 | 16 | DIN 934 | 5 | 000000000 | 00000 |
M24 | 3 | 36 | 19 | DIN 934 | 1 | 000000000 | 0000 |
M27 | 3 | 41 | 22 | DIN 934 | 1 | 000000000 | 00000 |
M30 | 3.5 | 46 | 24 | DIN 934 | 1 | 000000000 | 00000 |
M33 | 3.5 | 50 | 26 | DIN 934 | 1 | 000000000 | 00000 |
M36 | 4 | 55 | 29 | DIN 934 | 1 | 000000000 | 00000 |
M39 | 4 | 60 | 31 | DIN 934 | 1 | 000000000 | 00000 |
M42 | 4.5 | 65 | 34 | DIN 934 | 1 | 000000000 | 00000 |
M45 | 4.5 | 70 | 36 | DIN 934 | 1 | 000000000 | 00000 |
M48 | 5 | 75 | 38 | DIN 934 | 1 | 000000000 | 00000 |