FastenMaster FMHLGM412-50 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 50-Count

These screws are GREAT... good quality, nicely painted black, and as the head is flat, it nearly disappears once installed. They come with the Driver bit, so no need to look for one. Very happy, to the point that Im using this in various other projects.

EXCELLENT

Screws do what screws are supposed to do. Hold wood together fine. Really big heads, but not flat underneath so predrilling thin veneer materials is a must. Cons: Did not come with driver bit in either box I bought. No response for over 3 weeks from seller on making that right or not. Now it is past return or claim cutoff. False advertising to say driver included then not provide. ONE star due to the above.

Very manly fastener, I probably spent $1000 on fasteners of various types for my dock and deck. These may seem pricey but Im hoping they last forever. The box states that they outperform 3/8 Lag screws and I believe they would. However, I did not notice that they should not be used within 1000 of saltwater.

These screws are fantastic. Im building a pergola and was using 3 1/2 inch Pozidrive screws, and since I didnt have a drill bit long enough to drill a 3 1/2 inch pilot hole, the screws would start camming out and stripping once they went in past a few inches. I picked up these structural screws which use a spider drive. They are flawless. Even at 4 1/2 inches, NO cam out issues, WITHOUT pilot holes. Incredible. And the wide flat head works like a washer. Like the box says, these pretty much can replace 3/8 lag screws + washers. Awesome. Flat black color looks very clean too.

I am building planter boxes and they work perfectly!

Weve used a lot of different fasteners to hold deck framing together, and these are hands down the best so far. We drill a pilot slightly smaller and the same depth as the the smooth shank, then drive them with a cordless impact gun until they are flush. They are great a pulling and holding slightly warped framing lumber into line.

Nothing to dislike they are the best. Im a roof contractor primary use is securing roof anchors for saftey harnesses, into a truss of course. First experience 7 years ago building a tree house. Requires little energy meaning extended battery life. Going into a harder wood the aggresive thread will pull the wide head half through the side of a 2x4 without effort. These screw are hard to find sometimes and Amazon has good prices if you shop the site. Repeat buyer every few months.

I used these to create a frame of 4x4s for a 10 x 20 foot deck. They were very easy to use and the end result is very solid with a professional, finished look.

These bolts are easy to install with a impact driver and they hold really well. I have installed 100’s of them and can’t remember stripping stripping the head on a single one. They are expensive though but worth the money if you are building something you want to last. I have even removed them from old structures during renovations and was able to reuse them.