The Moses Dock Kit is specifically designed to work with the original Moses Forks. Each Dock has a threaded 3/8″ hole for a 3/8″ bolt (included with the Forks). This allows you to mount your Fork onto any 5/8″ baby pin.
The Moses Dock Kit also comes with an airplane pin on a rubber coated wire which screws into the Fork. We do not sell the safety pins separately. Y’all can get ’em direct from McMaster-Carr
The fork has a threaded hole for a screw to hold the safety pin wire. The screw is M3 x 6mm. You can get a bag of 100 for around $8 from McMaster-Carr