[C320-list] Mast thickness

[surprise thompson87.com]

The one that stripped was 8-32 so 10-32 would work. But I was also wondering if the coarser 10-24 would be less likely to strip in the future. 

> On May 17, 2023, at 9:50 AM, P.F. Ross via C320-list <c320-list at lists.catalina320.com> wrote:
> 
> Scott,
> 
> Was able to measure my replacement mast gate screws today.  I used 10-32 SS
> button head cap screws.
> 
> I used a lubricated #21 tap drill (.159) but a 5/32 (.156) would also
> work.  When tapping in spars, I like to chuck the tap in a variable speed
> drill and proceed slowly at low rpm, much easier to keep tap square rather
> than using a handle.  I also use "Tap Magic" Aluminum cutting fluid while
> tapping.
> 
> And as others have noted, I use "Tef Gel" on the threads when installing
> screws to help prevent corrosion.  Did this 25 years ago and all is well.
> I am able to snug screws down tightly and have not come close to stripping
> them.
> 
> I also posted a pic of the smooth button head profile on the gate in my
> owners gallery album online.
> 
> Regards,
> 
> Frank Ross
> Beta Wave #206
> 
>> On Sun, May 14, 2023 at 6:33 AM Bill & Kay- Diversion via C320-list <
>> c320-list at lists.catalina320.com> wrote:
>> 
>> Tefgel to prevent SS-aluminum corrosion. Lifetime supply on Amazon for $36:
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>> -----Original Message-----
>> From: Greg Flanagan via C320-list <c320-list at lists.catalina320.com>
>> To: C320-List at catalina320.com
>> Cc: Greg Flanagan <greg.flanagan at shaw.ca>
>> Sent: Sat, May 13, 2023 7:26 pm
>> Subject: Re: [C320-list] Mast thickness
>> 
>> Yes, thank you.
>> 
>> PS the machine bolts I used on the plate were machine head (round) not
>> knurled, so they need a screw driver. We use Roberts heads here in Canada
>> as they don’t strip out like slot or Phillips. However, a hex head would
>> also be good. I don’t take the plate off. I just loosen it and it gives an
>> opening where the glides can slip in.
>> 
>> Greg
>> Hoop Dancer #1076
>> Sidney, BC
>> 
>>> On May 13, 2023, at 4:10 PM, Dave Hupe via C320-list <
>> c320-list at lists.catalina320.com> wrote:
>>> 
>>> Greg-
>>> Probably Lanocote grease for use between different metals?
>>> Dave Hupe 1994 C320 #32
>>> 
>>> Sent from Yahoo Mail on Android
>>> 
>>> On Sat, May 13, 2023 at 6:56 PM, Greg Flanagan via C320-list<
>> c320-list at lists.catalina320.com> wrote: I had the same problem. I got a
>> drill bit and tap the next size up. Redrill the hole which will not
>> generate much metal as the next size is about the size of the old tap. The
>> thickness is  only about 3/8” so one needs to tap carefully maintaining a
>> strict perpendicular approach. Aluminum is easy to tap but still use oil
>> while doing this. I went with a fine thread. The cause of the initial
>> problem is a SS machine bolt going into aluminum. The dissimilar metals
>> rots the metal. A friend gave a grease like material (help needed on what
>> this is) to coat the new bolts with before I reassembled the plate. It is
>> now over 10 years and all is well (even better).
>>> 
>>> 
>>> Greg
>>> Hoop Dancer #1076
>>> Sidney, BC
>>> 
>>> 
>>