Re: silencer screw size & thread Home › Forum › Ask A Member › silencer screw size & thread › Re: silencer screw size & thread adam1961Canada Member - 2 YearsReplies: 366Topics: 88 October 29, 2018 at 9:26 pm #85184 The screws are oval head. Availabe at the Boathouse in Dorval. I don’t think Reno / HD have them.