#8 x 1 (100 Pack) Hex Washer Head Self Drilling Screws (1/2" to 2" Available), 410 Stainless Steel Self Tapping Sheet Metal Screws, No Pre-drilled Needs

I used about half of these today, screwing into mild steel square tubing having a wall thickness of approximately 0.074". I experienced no failures; every screw drilled properly and self-tapped into the hole. No heads snapped off. Before starting on the real parts, I tested a screw on scrap tubing. It worked fine. I was able to use the one test screw on a scrap of tubing to drill and tap into the tubing 4 times. The screw passed this test with no problem. That same screw drilled and self-tapped a 5th time, on the actual project. I used a Milwaukee M18 cordless impact driver. I drove them all until the all the way but let the trigger go upon hearing that the screw had fully seated. I wouldn't have been surprised if some screws had their heads twisted off, but 100% of the ones I used worked fine. I would use these again, although who knows if the seller will get the screws from the same manufacturer next time. I should also mention that they are stainless steel as advertised. There are some reviews claiming that they are not stainless because they are magnetic. This is a misleading, incorrect criticism. Not all stainless steel alloys are non-magnetic. These were claimed to be 410 stainless, which is lightly but definitely magnetic. Users with experience can tell usually tell by sight if a screw is stainless steel; the screws I received are. Be advised, however, that while 410 stainless is a relatively strong alloy, it is not as corrosion resistant as other common stainless steel alloys used in screws, such as 303, 304 or 316, the latter being the most corrosion resistant for readily available screws.

These are great quality and you can tell the seller cares from the way it is boxed. These self tapping screws aren’t cheap and don’t feel like they will break.

Working for attaching wood to my metal building

good product,just go slow last couple of turns

Good tapping screw for anything.

Tuve que buscar esos tornillos por Amazon porque Home Depot no tiene todos los tamaños.La estructura de screen de la piscina estaba soltando todos los tornillos muchos de ellos completamente oxidados. El proceso es lento pero se va cambiando los tornillos uno por uno. Buena solucion.

Update --- Ordered various lengths of #8, #10, #12 screws, and they were great.Then I ordered #14 screws. Some of the #14 x 3 screws worked fine and some did not. The issue was that in some cases, the hole the self drilling tip made was too large and the threads were unable to grip. The #14 x 1 screws didn't work at all. That was a pain because I screwed 3 of those screws in before realizing this. Stay away from the #14 screws, looks like they weren't manufactured properly.Original --- I am in the process of replacing all the visible screws in my pool enclosure (so I'm using these screws on soft aluminum). The builder grade screws were absolutely horrible and they have almost all rusted. I figured I'll have to replace a total of more than 1,000 screws of various sizes. I'm doing it a little at a time. These stainless screws are great for that purpose although they are not the same color as the pool cage, but I personally don't care. If it bothers you, you can always spray paint them after the fact. I anticipate the new stainless screws will outlast the cage.A few things to keep in mind:* If you are replacing steel screws that were embedded in aluminum, in some cases, you'll have to to go one size larger because of excess corrosion (due to galvanic corrosion). You could opt to simply go larger with all the screws, but I opted to only go larger when the screw is not able to grab. I've had to do that for about 1 out of every 10 screws.* I suggest you use a cordless impact driver to remove the old screws and drive the new ones in. I own 2 and think the one with 3 settings/levels works best. If you over torque, you will break the screw head. Out of about 150 so far, I've only broken 1. That was on me, and not the screw.* The screw head sizes will vary based on the screw size, which is annoying at times, given that you have to switch driver sizes. I bought a set of metric (mm) magnetic nut driver for my impact driver. Then realized that the current screws are SAE (imperial/inch). So removal requires an SAE driver socket and inserting requires a metric driver socket. You could try to use the metric sockets even if you have SAE screws, but if the screw you are removing is badly rusted, you'll risk stripping the head and rounding if off, which might make it impossible to remove without an extractor. I suggest you get a set of drier sockets that includes both SAE and metric. That way you don't have to stop your screw replacement project to get a new socket from the store.* For the for the people complaining about the silicone washers, they help reduce the amount of galvanic corrosion between stainless steel and metals such as aluminum. I personally think having those little washers there is plus. Unfortunately, the seller only includes them with the larger sized screws.

They come in a plastic bag. I don’t usually like stuff that looks packed by hand however I opened the bag and counted the contents and it was 102 screws in a 100 count bag. Other than that they are screws doing what screw do. These are a good price for stainless steel