If you came here expecting one simple answer, you probably won't get one. I know that sounds indecisive, but after four years of checking fastener lots for a structural fastening distributor, I have a thick file of examples proving that the right fastener depends on the load path and the schedule. There is no universal Simpson Strong-Tie screw that solves every job. There are, however, three scenarios that cover most of the calls I get.
Before the scenarios: my bias. I am not a structural engineer. I am the quality/compliance person who reviews incoming lots and outgoing orders, roughly 180 SKUs a year. In 2024 I rejected about 6 percent of first deliveries because the coating was wrong, the lot certification did not match, or the marking was incomplete. That means I am careful, maybe annoying, and definitely in favor of documentation.
The Simpson Strong-Tie products I hear about most are Titen HD concrete screws and the screws approved for joist hangers. The confusion usually starts when someone asks which one is stronger. That is the wrong question. You need to ask which one is listed for the connection you are actually making.
Scenario 1: You are connecting a joist hanger to wood
If you searched for Simpson Strong-Tie screws for joist hangers, this is probably the scenario. You are looking at a steel connector that transfers load through fasteners into wood. The correct starting point is the hanger model, not the screw type. According to Simpson Strong-Tie's current catalog and online fastener selection charts (strongtie.com, accessed January 2025), each hanger load table lists approved fasteners. Some hangers have a column for structural screws, often Strong-Drive SDWS screws. If the table lists no screw, nailing is the way. A non-listed screw, no matter how tough-looking, does not have a published connection value for that hanger.
Why does this matter? A common assumption is that a screw is stronger than a nail. In some direct comparisons, that is true. But in a steel hanger, the connection capacity can depend on head size, thread engagement, and the hanger seat itself, not just single-shear strength. A bigger or harder screw can even split the lumber. The anti-intuitive part is that bigger is not safer. The hanger is a system, and a fastener substitution changes the whole assembly.
On a deadline, many contractors want to switch to screws because it speeds up overhead work. That is a legitimate productivity move when the hanger is listed for a screw. It is a costly experiment when it is not. I have watched a framing inspection get red-flagged because someone substituted generic coated screws into joist hangers while rushing to beat the weather. It was not the screw cost; it was cutting out hangers and redoing the work. That is the kind of certainty you pay for.
Scenario 2: You are anchoring to concrete or masonry
Now switch to concrete. You have a steel column, a guardrail post, or an equipment rail to anchor, and no anchor bolt was placed in the pour. You also do not have time for adhesive to cure. This is where Simpson Strong-Tie Titen HD concrete screws earn their keep. Titen HD is a true screw anchor. It threads into concrete after you drill the specified hole, and it can be removed with a wrench if the layout is wrong. That feature alone has saved me more than once.
But don't let the word screw make it feel simple. Titen HD anchors have a published installation hole size and depth. The hole must be cleaned; dust in the hole is the enemy of thread engagement. Over-tightening is also a risk. Simpson's instructions specify a setting torque for Titen HD sizes. A beam-style torque wrench can do the job, but I prefer a 3/8 drive electronic torque wrench because it gives you a target reading and removes the guesswork. If the anchor requires a torque outside that wrench's range, use the correct bigger drive size, but do not skip the check. This is not about making the anchor extra tight. It is about hitting the number that makes the connection predictable.
I still kick myself for the time I thought tight plus another quarter turn meant better. It does not. A screw anchor that is overdriven can lose capacity in the concrete, and the fix is rarely simple. That is why I now treat the torque wrench as a schedule tool, not a lab tool.
Scenario 3: You are driving structural fasteners all afternoon
The third scenario is less about the fastener itself and more about the tool you use to drive it. If you are installing multiple joist hanger screws or a row of Titen HD anchors, your socket choice affects the whole job. For hex-head structural fasteners, I keep the Simpson Strong-Tie 84941 impact hex socket set in my kit. It is impact-rated, which means the sockets are designed to handle the hammering of an impact driver without cracking, spreading, or rounding the fastener head. A chrome automotive socket can round a hardened hex head, and then you are drilling out a screw while your crew watches.
I still kick myself for using a normal socket once. It rounded the head on the third Titen HD anchor in a critical base plate. It took us about forty minutes to remove and replace it. The correct impact socket set costs far less than the time we wasted. That is when a tool purchase stops being optional.
So which scenario are you in?
Here is the shortcut I use when I am looking at a project. First, identify the base material. Wood and a steel connector is scenario one. Concrete or masonry is scenario two. If the job is repetitive, scenario three matters too. Second, find the approved fastener in the manufacturer's table before you buy. If there is no load table or catalog page for the connection, stop and ask. Third, decide how much time you really have. If the deadline is tight, paying for certainty is not a luxury. In March 2024, my company paid $416 for overnight shipping of two cases of Titen HD anchors because a contractor ran out. The idle crew and mobilization would have cost around $15,000. The rush fee was a no-brainer. The same logic applies when you buy approved parts and calibrated tools.
Now the awkward search: how to unlock the nail gun BO6. If that query is about a video game, I cannot help. In real construction, there is no unlock code for a nail gun. A nail gun only becomes part of an approved connection when the nail type, length, and head pattern are listed for the connector. If you need to use a nail gun on a joist hanger, choose the nail from the hanger table, set the depth so you do not overdrive or underdrive, and test it in scrap before shooting it into a beam. That is the only unlock that matters.
Bottom line: start with the manufacturer's load table, keep your tools calibrated, and stop hoping the fastener will be okay. Simpson Strong-Tie makes components that work as an engineered system, but they work as documented. Four years ago I would have called any beefy screw good enough for a hanger. I was wrong. You can learn from that mistake instead of making it. There is no single universal Simpson Strong-Tie fastener, but there is a single method: match the connection, verify the listing, and protect the schedule with the right tools.
