Gray Ports - replacement dogs
This is the part your landlubber friends probably call the "knob.
" If yours are broken consider these Gray replacements from Bomar.
Please note: These dogs are a newer generation and may not be compatible with old dogs from the 1980's. Check the inside of the dog; if it has brass threads you need to replace both the dog and steel pin. If the threads are not brass the current dog should fit.