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51 MERC-CT · 04-09-2021, 08:56 AM

If you are talking about spiral drive nails then measure the dia. of the ones you have and make the hole appox. .020-.030" smaller.
Try it on a piece of sheet metal to verify and adjust as necessary.
The factory nails were not pre-drilled but were shot directly thru to pierce the sheet metal.

04-09-2021, 08:56 AM	#2
51 MERC-CT Senior Member Join Date: May 2010 Location: East Hartford, Ct Posts: 5,898	Re: Recommended hole size for drive rivits If you are talking about spiral drive nails then measure the dia. of the ones you have and make the hole appox. .020-.030" smaller. Try it on a piece of sheet metal to verify and adjust as necessary. The factory nails were not pre-drilled but were shot directly thru to pierce the sheet metal. __________________ DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES