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304 stainless steel is non-magnetic or slightly magnetic
AC
Reviewed in the United States on May 5, 2025
The included hex key seemed a bit small -- and as a result, about 1/2 of the screw heads stripped when I tightened them.
Michael S
Reviewed in the United States on May 25, 2025
Works great. Seems to be a quality produt.
Customer
Reviewed in the United States on May 24, 2025
They fit the nuts and threaded holes I have on my equipment. Nothing is stripped, the finish looks good.Perfect for me.
DStewart
Reviewed in the United States on May 20, 2025
Purchase these a couple times and the nuts, good quality and great price. This stuff is a million dollars at my local hardware store.
VineReviews
Reviewed in the United States on May 20, 2025
These screws look well made with clean threads and no visible burs. They come with a small allen wrench so you don't have to search the tool box to find one. The countersunk flat head makes for a nice fit and finish for projects that need that type of fastener. The stainless steel should also hold up well to corrosion, especially with a little dab of anitseize.
Customer
Reviewed in the United States on May 19, 2025
This review is for BNUOK #4-40 Screws, 200Pcs #4-40 x 3/8 Inch Flat Head Socket Cap Machine Screws, 304 Stainless Steel 18-18 Countersunk Bolts, Full Thread (with Hex Spanner)This is 200pc of 4-40 x 3/8" flat head hex screws. The threads are properly sized with the head OD is about 0.228". Finish is good and no defects were noticed. The supplied 1/16" Allen wrench fits the hex recess somewhat loosely, but is acceptable. The material is supposed to be 304 stainless, bu they are slightly magnetic, which means they may not be 304, but could be 410 or another stainless alloy. Deducting one star for this.These are acceptable quality for general use. I would test them before using them in a highly corrosive environment.Good price for this quantity of fasteners.
Danen G.
Reviewed in the United States on May 13, 2025
some may say screws are screws, but these are great. They are shorter than I was able to find locally and much less expensive when you can find them in bulk. Thet have a uniform finish and consistent throughout the batch.
Jayme Johnson
Reviewed in the United States on April 17, 2025
These are pretty much my go-to for some of my 3D prints. The plastic isn't particularly hardy so these are usually a good way of limiting the amount of stress I put on the assemblies. If this small of a screw can't hold it, the print probably wouldn't work without adding brass heat insets. Most recently I've been using these to make wallets and they're the perfect size.I'm going to be honest with you here. I did not count how many screws were included. I know, I know, it's a pretty lackadaisical approach to reviewing but sometimes you just have to trust your gut. No, that doesn't mean I ate them. My quick eyeball of the goods leaves me with the impression that I got 201 screws in this bundle.One thing that I will say that was nice that I didn't expect is that they came in a small plastic container that double latches closed. It's cheap and probably cost about $0.10 but the fact is, it wasn't necessary to include it when you could just send them all in a plastic bag. It's small details like this that impress me when you're talking about an everyday item that really can't be set apart from any other similar item.Value-wise these are pretty standard. The 100 pack is only $1 less than the 200 pack which obviously significantly increases the per screw cost. However when you take into account that you don't even have to make a trip to the store for these it's a very small premium to pay if there's actually any difference vs in store prices.
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