This is a CNC manufactured clevis in stainless steel to fit the 2 speed gearbox fitted to Douglas 2 3/4hp models. It is copied from an orgiinal Douglas clevis. (may also fit other gearboxs for Douglas's of this era.
As you can see in the second photograph, the clevis is fitted onto the selector rod shaft of an original 2 speed Douglas gearbox of the type fitted to Douglas 2 3/4hp models of approx 1912-1923.
the hole is 0.3125" (5/16") and the clevis is threaded to take a 0.250" (1/4") BSF/BSC thread.
Note: email us on normal sales email if you require 1/4" stainless steel rod to go with this clevis, we may be able to quote for that as well