[C320-list] Mast thickness

[P.F. Ross]

Scott, I did this many years ago when I replaced the original
plastic-headed thumbscrews with button head socket cap screws. Thumbscrews
would sometimes catch sail when raising, smooth, rounded button heads never.

Can't remember size but I know it was a fine thread. Tap drill was barely
larger than original threads, easy mod.  Will be back at boat on Tue and
will let you know size then.

Frank Ross
Beta Wave #206

On Sat, May 13, 2023, 5:36 PM surprise thompson87.com via C320-list <
c320-list at lists.catalina320.com> wrote:

> Reinstalling my mainsail yesterday one of the screws attaching the mast
> track gate plate felt like it stripped. I'll have to drill it out and retap
> for a larger size. I'm wondering how thick the mast section is there and
> what thread I should use. Does anyone have an opinion? Is it better to use
> a fine thread or a coarser one in this application given that I disassemble
> it each year.
>
> T. Scott Thompson
> Catalina 320 "Surprise," #653 (1999)
> surprise at thompson87.com<mailto:surprise at thompson87.com>
>
>