1965 C10 - rear bumper license plate bracket bolts - info ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Woogeroo · 10-10-2009, 09:07 PM

1965 C10 - rear bumper license plate bracket bolts - info ?

I have a '65 c10... and I bought a used rear bumper license plate bracket for it.

My bumper does not have the bolt holes in it, so I'm curious about what size bolts and things were used?

The ones I've seen in person look like the carriage bolts with the square part before the thread that it seats into.

Any information on the bolts or measurements on the hole placement is appreciated.

Thanks,

-W

63 & 64 Bowties · 10-11-2009, 06:51 AM

They're 1/4" carriage bolts. The length is not critical since it's hidden under the bumper and bracket. But, how are you gonna get the square holes in your bumper?

*LILRED66* · 10-11-2009, 12:38 PM

With the proper drill size, the square shoulder of a carriage bolt will draw into the round hole and hold itself from twisting. The width of the holes is determined by the factory holes in the license plate bracket. I hope this help -W.

Woogeroo · 10-11-2009, 01:00 PM

Quote:

Originally Posted by 63 & 64 Bowties

They're 1/4" carriage bolts. The length is not critical since it's hidden under the bumper and bracket. But, how are you gonna get the square holes in your bumper?

My machine tool instructor said he would show me.

I'll try to take pictures... if I can remember to.

A machine tool shop friend of mine said that one way to do it would be to drill the corners, drill the hole, then finish it off with a file.

-W

63 & 64 Bowties · 10-11-2009, 08:06 PM

Quote:

Originally Posted by Woogeroo

My machine tool instructor said he would show me.

I'll try to take pictures... if I can remember to.

A machine tool shop friend of mine said that one way to do it would be to drill the corners, drill the hole, then finish it off with a file.

-W

Not disputing a machine tool instructor, but on chrome? I didn't know it could be done.
Pics would be great when you guys do it. I guess you learn something every day on here.

*LILRED66* · 10-11-2009, 09:06 PM

A 3/16" hole with the corners filed out with a square mill bastard file will do the trick also.

Woogeroo · 10-13-2009, 08:24 PM

my rear bumper is painted...

I imagine you'd have to do the holes in the chrome bumper, before it was chromed.

-W

10-10-2009, 09:07 PM	#1
Woogeroo Registered User Join Date: Aug 2003 Location: tool box Posts: 3,115	1965 C10 - rear bumper license plate bracket bolts - info ? 1965 C10 - rear bumper license plate bracket bolts - info ? I have a '65 c10... and I bought a used rear bumper license plate bracket for it. My bumper does not have the bolt holes in it, so I'm curious about what size bolts and things were used? The ones I've seen in person look like the carriage bolts with the square part before the thread that it seats into. Any information on the bolts or measurements on the hole placement is appreciated. Thanks, -W

10-11-2009, 06:51 AM	#2
63 & 64 Bowties and a few others Join Date: Jun 2007 Location: Blue Ridge Mountains of VA Posts: 5,638	Re: 1965 C10 - rear bumper license plate bracket bolts - info ? They're 1/4" carriage bolts. The length is not critical since it's hidden under the bumper and bracket. But, how are you gonna get the square holes in your bumper? __________________ Bill US Army Vet -193rd Infantry BlueRidgeMuscleCars.com “The greatness of a nation and its moral progress can be judged by the way its animals are treated” Gandhi

10-11-2009, 12:38 PM	#3
LILRED66 Account Suspended Join Date: May 2005 Location: Kansas City, KS Posts: 3,906	Re: 1965 C10 - rear bumper license plate bracket bolts - info ? With the proper drill size, the square shoulder of a carriage bolt will draw into the round hole and hold itself from twisting. The width of the holes is determined by the factory holes in the license plate bracket. I hope this help -W.

10-11-2009, 09:06 PM	#6
LILRED66 Account Suspended Join Date: May 2005 Location: Kansas City, KS Posts: 3,906	Re: 1965 C10 - rear bumper license plate bracket bolts - info ? A 3/16" hole with the corners filed out with a square mill bastard file will do the trick also.

10-13-2009, 08:24 PM	#7
Woogeroo Registered User Join Date: Aug 2003 Location: tool box Posts: 3,115	Re: 1965 C10 - rear bumper license plate bracket bolts - info ? my rear bumper is painted... I imagine you'd have to do the holes in the chrome bumper, before it was chromed. -W



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