Type | Name | Structure | Nominal size (L×B) |
OEHC-WeHC-TypeA | single-side acting weathertight hatch cover | butterfly nut | 450×630 530×530 630×630 630×830 830×830 830×1230 1030×1030 1330×1330 |
OEHC-WeHC-TypeB | double-side acting weathertight hatch cover | cuniform hand | 450×630 530×530 630×630 630×830 830×830 830×1230 |
OEHC-WeHC-TypeC | quick acting weathertight hatch cover | center rotating hand | 530×530 Φ530630×630 Φ630 |
OEHC-WeHC-TypeD | sunk weathertight hatch cover | fallen rotating hand | 530×530 630×630 630×830 830×830 |
OEHC-WeHC-TypeE | single-side acting non-weathertight hatch cover | butterfly nut | 450×630 530×530 630×630 630×830 830×830 |
OEHC-WeHC-TypeF | double-side acting non-weathertight hatch cover | cuniform hand | 450×630 530×530 630×630 630×830 830×830 |