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Pilot Hole Drill Sizes in Fiberglass

Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: General Discussion
Forum Discription: Anything Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=50641
Printed Date: March-03-2025 at 12:50pm


Topic: Pilot Hole Drill Sizes in Fiberglass
Posted By: Jonny Quest
Subject: Pilot Hole Drill Sizes in Fiberglass
Date Posted: May-24-2022 at 12:14am
Do any of you gents have a chart showing the proper size drill bits for pilot holes in fiberglass for screws sizes #6 #8 #10 and #12.

Thanks.  JQ


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Current
2003 Ski Nautique 206 Limited

Previous
2001 Ski Nautique Open Bow
1994 Ski Nautique Open Bow

Aqua skiing, ergo sum


Replies:
Posted By: 63 Skier
Date Posted: May-24-2022 at 11:48am
Sorry I don't have a chart.  Being honest, I hold bits up to the screws and guess, erring on the small bit size.  Then I drill a hole in waste material to check.  I know I should care about the correct size but this seems to work.


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'63 American Skier - '98 Sport Nautique

Posted By: pjsmoreno
Date Posted: May-24-2022 at 2:51pm

I do the same as to hold the drill bit up to the screw and make sure only the threads are visible. Fiberglass does not have much forgiveness when you under size the hole and put a screw in. Too much of a turn will twist off the screw head. Even if its stainless steel.

Posted By: Jonny Quest
Date Posted: May-24-2022 at 3:34pm
I used my tried-and-true pilot hole guide for wood, but it’s tough going.  I’m afraid to snap a SS screw…

JQ


-------------
Current
2003 Ski Nautique 206 Limited

Previous
2001 Ski Nautique Open Bow
1994 Ski Nautique Open Bow

Aqua skiing, ergo sum


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