| Studs | Type | D1 | D3 | I2 | Ferrule |
| Manhole covers | MR 20 | M20 | 21 | 35 | SR20 |
| Manhole covers | MR 16 | M16 | 17 | 30 | SR 16 |
 |
|
THE MOST IMPORTANT ADVANTAGES * Connection fully sealed, since no holes are drilled * Material and welding saved on the reinforcement flange. * No unintentional turning of studs when tightening and loosening nuts. * Safe, quick and economical attachment. * Performance according to DIN 0083
|
| Using this attachment technique, threaded studs for tank covers can be attached quickly, safely and economically. Substantial savings can be made compared with traditional screw-type connections. |