DKR (DIN 472)
| RING NO. | Remarks | Dh | Da | W | d | Df | T | S | RINGSafetyfactorof3 | GROOVESafetyfactorof2 | |
| DKR-370 | DKR-370 | 370 | 380 | 6.2 | 5 | 382.73 | 5.87 | 12.7 | 1881778 | 901619 | |
| DKR-380 | DKR-380 | 380 | 390 | 6.2 | 5 | 392.79 | 5.87 | 12.7 | 1932637 | 925987 | |
| DKR-390 | DKR-390 | 390 | 400 | 6.2 | 5 | 402.84 | 5.87 | 12.7 | 1983496 | 950355 | |
| DKR-400 | DKR-400 | 400 | 410 | 6.2 | 5 | 412.93 | 5.87 | 12.7 | 2034354 | 974723 |
