What is this?

[just-dig]

I find these in my yard and other places in town. I have no idea what they are. Any idea?

Thanks, Mark

 

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[PickTime]

It looks like it might be a concrete bolt anchor. Two halves per drilled hole.

 

[Gare]

It looks like it might be a concrete bolt anchor. Two halves per drilled hole.

Good guess I think

 

[villagenut]

Usually those have raised threads and are open on both ends dont they?

 

[just-dig]

Usually those have raised threads and are open on both ends dont they?

Lead wedge anchors do. This cast iron piece has only one hole and no threads. I can see a lag bolt spreading it out into a drilled hole, but I’m not convinced yet it is an anchor. They always have reminded me of anchors though.

 

[Almy]

It appears to be designed to go in a hole like the anchor you have been mentioning. What if the hole were in rock, the two pieces of cast iron were inserted and then a wooden plug was forced into the smaller hole created by the 2 iron pieces. Then the wood was wetted and the expansion of the wood caused iron pieces to separate and the rock to crack. I've heard of wood being used to crack rock but wondered how it could be made tight enough in a rough, rock hole. Maybe this is a way?