Bolting
Screw connections can be "normal" and "secured". In the normal case, the prestressing is created by the nut. Secured connections posess different elements:
1. Additional prestressing created by a spring lock washer or a domed washer
2. Double nut
3. Safety plate
4. Tack welding (nut to bolt)
| Material group | Materials | Comment |
|---|---|---|
| A1 | 1.4300 1.4305 | |
| A2 | 1.4301 1.4303 1.4306 | Standard |
| A3 | 1.4306 1.4550 1.4590 | |
| A4 | 1.4401 1.4404 | Standard |
| A5 | 1.4436 1.4571 1.4580 |
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