Technical Tech needed: what are these for?

Cleaning out my barn, I’m finding a few things I didn’t know I had. Some things I just don’t remember at all. Like these...
Anyone know what they are for?



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I want to say Buick backing plates later than 59 but it’s just a guess


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They are for stopping the car !

 

Smartass...
Notice the two bolts to attach it to the spindle? I thought that was odd.
r


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If they are Buick, that make two sets I found in the barn this week...
Anyone need some? I don’t.
r


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never heard of anything with only two bolts to hold a backing plate, even light trailers. should narrow the search down quite a bit

 

Is that an aluminum backing plate? Odd. I was thinking trailer.

 

What ever it is, it's a self adjuster and those came out in the mid '50s.

 

They do look like Buick. Are they 12" diameter?

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I do believe they are 12 inches.
r


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I had a pair of those that I took off a '62 Buick to get the aluminum brake drums. Ended up using the hardware off them with '58 Buick backing plates. However, mine didn't come with self adjusters.



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Ford has some 2 bolt backing plates, around 1957 I think. HRP

 

Looks like the 3rd bolt to the spindle is above the wheel cylinder.

 

Funny, I hadn’t caught that.
r


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Another vote for Buick with the third bolt thru the top like that.