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DIN 7991-1986
Hexagaon socket countersunk head cap screws
Mechanical property ISO 898-1:2013(E)
Class 8.8 . 10.9 . 12.9
Marking NE 8.8 / 10.9 / 12.9
Raw material : 5140 . 4135 . 4140 . SCM435
Thread,d | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 |
| P1) | 0.50 | 0.70 | 0.80 | 1.00 | 1.25 | 1.50 | 1.75 | 2.00 | 2.00 |
| a | 90o | ||||||||
| b TL2) | 12 | 14 | 16 | 18 | 22 | 26 | 30 | 34 | 38 |
| b TL3) | - | - | - | 24 | 28 | 32 | 36 | 40 | 44 |
| b TL4) | - | - | - | - | - | 45 | 49 | 53 | 57 |
| c | 0.2 | 0.3 | 0.3 | 0.3 | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 |
| dk max. | 6 | 8 | 10 | 12 | 16 | 20 | 24 | 27 | 30 |
| dk min. | 5.7 | 7.64 | 9.64 | 11.57 | 15.57 | 19.48 | 23.48 | 26.48 | 29.48 |
| da max. | 3.6 | 4.7 | 5.7 | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 |
| ds max. | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 |
| ds min. | 2.86 | 3.82 | 4.82 | 5.82 | 7.78 | 9.78 | 11.73 | 13.73 | 15.73 |
| e5) min. | 2.3 | 2.87 | 3.44 | 4.58 | 5.72 | 6.86 | 9.15 | 11.43 | 11.43 |
| k6) max. | 1.7 | 2.3 | 2.8 | 3.3 | 4.4 | 5.5 | 6.5 | 7 | 7.5 |
| r min. | 0.1 | 0.2 | 0.2 | 0.3 | 0.5 | 0.5 | 1 | 1 | 1 |
| s nom. | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 10 |
| s min. | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 | 10.025 |
| s max. | 2.1 | 2.6 | 3.1 | 4.12 | 5.14 | 6.14 | 8.175 | 10.175 | 10.175 |
| t nom. | 1.2 | 1.8 | 2.3 | 2.5 | 3.5 | 4.4 | 4.6 | 4.8 | 5.3 |
| t min. | 0.95 | 1.55 | 2.05 | 2.25 | 3.2 | 4.1 | 4.3 | 4.5 | 5 |
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