Hey fella's trying to work out if there is a thread size issue or maybe just a burr inside the PH7A.
I bought both items separately, the 6 hole Parker Hale aperture came from the UK recently and I thought it would be a straight screw in, Its seems to want to then seems to not want to, obviously I dont want to stuff threads up and research indicates both should be 7/32-40 ?? is this correct