[HWYSTR455]

Originally Posted by 78w72

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Im not sure of the size of a 64gto sway bar bolt but if they are the common 3/8 size used on most 70's cars they use a standard 9/16 drill bit for the hole, they can also be installed with the bolt/washer/nut set up as shown in the vid links posted in that thread...

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It really depends on who makes the rivnut, the RIVETKING ones I use spec a 17/32 drill size.

Will stand by: Be SURE to use the correct size drill bit for the rivnut you use, from the same manufacturer.

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[HWYSTR455]

Fastenal also recommends a 17/32 drill size:

https://www.fastenal.com/product/details/0125626

https://www.fastenal.com/content/pro....RFH.YZ.06.pdf


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[78w72]

Originally Posted by HWYSTR455

It really depends on who makes the rivnut, the RIVETKING ones I use spec a 17/32 drill size.

Will stand by: Be SURE to use the correct size drill bit for the rivnut you use, from the same manufacturer.

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I agree it depends on the brand/type of rivnut/nutsert... never questioned verifying the hole size, always confirm that.

Some sources say 3/8 rivnuts use a 9/16 hole, some say 17/32 yet some say its a range of size depending on how tight you want the nutsert in the hole and that its best to measure the OD of the rivnut to determine size as they can vary.

When I asked the guy behind the counter at fastenal what size drill bit for the rivnut I bought, he blurted out 9/16 without hesitation, but the fastenal link does say 17/32. If it does require a 17/32 drill bit, general purpose ones are like $5-6 and easy to find at common home stores or hardware stores so thats not really a big deal.

https://yardandgardenguru.com/nutsert-drill-size-chart/