| Description | Assembly | Model | Designation | 
| ELBOW FITTING | CHASSIS | 121.100 | TYP 190Db BM 121.110 - .111, .100 - .102 | 
| ELBOW FITTING | CHASSIS | 121.101 | TYP 190Db BM 121.110 - .111, .100 - .102 | 
| ELBOW FITTING | CHASSIS | 121.102 | TYP 190Db BM 121.110 - .111, .100 - .102 | 
| ELBOW FITTING | CHASSIS | 121.110 | TYP 190Db BM 121.110 - .111, .100 - .102 | 
| ELBON FITTING | CHASSIS | 121.110 | TYP 190D BM 121.110 - .111 | 
| ELBOW FITTING | CHASSIS | 121.111 | TYP 190Db BM 121.110 - .111, .100 - .102 | 
| ELBON FITTING | CHASSIS | 121.111 | TYP 190D BM 121.110 - .111 | 
| ELBOW FITTING | ENGINE | 127.980 | TYP M 127.I, .IV BM 127.980, .983 | 
| ELBOW FITTING | ENGINE | 127.983 | TYP M 127.I, .IV BM 127.980, .983 | 
| ELBOW FITTING | ENGINE | 189.980 | TYP M 189.I BM 189.980,.981 | 
| ELBOW FITTING | ENGINE | 189.981 | TYP M 189.I BM 189.980,.981 | 
| ELBOW FITTING | ENGINE | 621.914 | TYP OM 621.IV BM 621.914 |