Beckson screw-out plates provide access without the use of tools, with a single start, non-jamming (no cross-thread), extra strong, self-cleaning buttress thread. They incorporate a self-aligning center and an innovative gasket to assure a watertight seal. A unique back-up sealing wall leaves the plate water resistant, even if the gasket is removed.
| Brand | Beckson Marine |
| ID | 4" |
| OD | 6-1/8" |
| Color | Black |
| Hole | 4-1/2" |
| Center | Smooth |