Please see pictures for detail. some rust forming along threads, but nothing too serious.
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Then there's a dozen of heavy folded steel and they are 3/4 gap. Then the flat folded steel are 1/2 gap and two of the six of them are missing their square head screws. So these three sets just described are all holed for 3/8 rod.
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cooper crouse-hinds 533 2" beam clamps. 3/8"-16 tapped hole.
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Type Threaded Rod Beam Clamp. Material Malleable Iron. Rod Size 1/2"-13. Finish Hot Dip Galvanized. Bolt Size 1/2"-13. Mount Type Bottom Flange.
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