High Type
GN 6339 Heavy Duty Washers, Steel, tempered, blackened or GEOMET-treated
| d1 H13 | d2 h13 | s | d3 H13 | f | for screws with thread size |
|---|---|---|---|---|---|
| 6,3 | 17 | 3 | 7 | 1 | M 6 |
| 8,4 | 21 | 4 | 9,5 | 1,5 | M 8 |
| 10,4 | 25 | 4 | 11,5 | 1,5 | M 10 |
| 12,5 | 30 | 6 | 14 | 2 | M 12 |
| 14,5 | 36 | 6 | 16 | 2 | M 14 |
| 16,5 | 40 | 6 | 18 | 2 | M 16 |
| 18,5 | 44 | 8 | 21 | 2,5 | M 18 |
| 20,5 | 44 | 8 | 23 | 2,5 | M 20 |
| 22,5 | 50 | 8 | 25 | 2,5 | M 22 |
| 24,5 | 50 | 10 | 27 | 3,5 | M 24 |
| 28 | 60 | 10 | 31 | 3,5 | M 27 |
| 31 | 68 | 10 | 34 | 3,5 | M 30 |
Specification
- Tempered to tensile strength
Rm = 1220 ... 1400 N/mm² - Fine machined and slide ground
BlackenedBT
GEOMET 500-treatedGO
RoHS
Information
The influence of a washer on the quality of the screwed connection is very often underestimated. With washers GN 6339, high quality preloaded screwed connections can be established. A high static clamping force can be reached avoiding loss of tension.
At a specified preloaded clamping force it is often possible to use thinner bolts. This can result in a better ratio between clamping distance and bolt diameter to minimise the danger of failure.
The case hardened smooth bolt head/screw contact face leads to a lower and more constant friction co-efficient even when continuous clamping and releasing operations are required.
Washers GN 6339 are only suitable for machine con-struction bolts of classes 8.8 / 10.9 / 12.9, and not for steel bolts DIN 6916.
| How to order |
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GN 6339-20,5-44-8-BT |
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