I'm just a handyman. A lot of my recent projects require metric screws, usually M3 or M4. I found the Small Parts folks offered a couple of bolts, washers, and nuts for a good price. I don't have many lengths so I decided to buy a few lengths here and trim them down if needed. I don't know if Black Oxide is good or not. But I wanted Phillips heads. Sometimes you can get cheap prices, but a special tool is required to tighten the head. I cut them to the correct length with a dremel tool and the threads were still fine. So I think the quality and hardness of the material should be ok. The price for the lot was good too. These and other screws from Small Parts arrived quickly and I was very happy with the price for the quantity I bought.
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