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Old 07-04-2022, 01:33 PM   #1
kcstreetracer
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U bracket bolt size

Anyone know what the bolt size is for the u bracket on the steering column?
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Old 07-04-2022, 05:39 PM   #2
MikeB
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Re: U bracket bolt size

I'm not sure what you're referring to. Can you post a photo?
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1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
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Old 07-04-2022, 07:10 PM   #3
kwmech
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Re: U bracket bolt size

5/16-18 x 3/4 or 1''
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Old 07-04-2022, 10:14 PM   #4
indymachinist
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Re: U bracket bolt size

Quote:
Originally Posted by kwmech View Post
5/16-18 x 3/4 or 1''
Yep.
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Old 07-05-2022, 08:28 AM   #5
MikeB
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Re: U bracket bolt size

Oh, yeah. That bracket, more like a strap. Mine was kind of a b!tch to line up with the dash frame holes. I had to to pry things together with a large screwdriver. Body bolts like this would have helped.

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1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
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Old 07-05-2022, 08:48 AM   #6
Willie Makeit
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Re: U bracket bolt size

Au-ve-co part number 11320.

Buy mine from Rock Auto for .32 cents each & come in a box of 25 pcs. GM used this exact bolt ALL over the 67-72 trucks.
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Old 07-05-2022, 10:05 AM   #7
MikeB
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Re: U bracket bolt size

Quote:
Originally Posted by Willie Makeit View Post
Au-ve-co part number 11320.

Buy mine from Rock Auto for .32 cents each & come in a box of 25 pcs. GM used this exact bolt ALL over the 67-72 trucks.
I don't know about those, but some are black phosphate coated to prevent rust. Others are not. Something to consider when using them on fenders, etc.
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1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
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Old 07-05-2022, 12:30 PM   #8
Willie Makeit
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Re: U bracket bolt size

Quote:
Originally Posted by MikeB View Post
I don't know about those, but some are black phosphate coated to prevent rust. Others are not. Something to consider when using them on fenders, etc.
I don't remember seeing any 5/16"1-18 body fasteners that were not black phosphate but never say never.

From what I have found, AUVECO was the original supplier to GM on these fasteners "back in the day" and the new ones I've bought from Rock Auto appear to be the same exact black phosphate bolts with a swaged-on washer that I've pulled out of literally dozens of original 67-72 trucks.
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Last edited by Willie Makeit; 07-05-2022 at 12:53 PM.
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Old 07-05-2022, 05:10 PM   #9
MikeB
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Re: U bracket bolt size

Very nice!
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1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
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