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Any recommendations for US/Canada online retailers of screws with steel strength labels (e.g. Grade 8 Alloy Steel, low/medium carbon, or any ASTM rating) and country of origin? Amazon is a lottery on both metadata and whether the received screws will match the metadata.

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McMaster Carr is best in class. Their website allows you to easily and quickly drill through these categories.

Their site won't provide shipping prices, but its reasonable, and if you call they'll estimate it. My favorite thing about them is they were founded by a stationary engineer (think a ship or train engineer but stationary, such as: big buildings/campuses) over a hundred years ago. I'm a working stationary engineer myself.

They now provide shipping costs, at least in the Los Angeles area.

Much of the shipping work is done by private contractors like DGC. I get same day deliveries, often for $7-10.

Was looking for strong lag screws for wood. Like most places, McMaster-Carr has only regular steel for lag screws, but they have Grade 8 lag bolts. Eventually found Grade 5 lag screws from SPAX, https://spax.us/resources/blog/spax-powerlags-vs-conventiona...

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