Bill’s company designs self-checkout systems used in grocery stores. He chooses Mr. Metric for his unique metric fastener needs because he requires unique and hard to find Self-Tapping Screws that can’t be found in other hardware stores.
Bill also has a great deal of trust when ordering metric fasteners from Mr. Metric. He knows that even in a time crunch, we’ll come through.
Bill is using his Mr. Metric fasteners on his BMW motorcycle to improve his ride with new accessories and attachments. Mr. Metric fasteners are great for motorcycle customizations, repairs or regular maintenance.
Mr. Metric has a vast selection of metric fasteners from metric screws, metric nuts, metric bolts, metric washers, metric pins, in a variety of materials like steel, stainless steel, brass and more. Need a hard to find fastener for your bike? You have come to the right place! Mr. Metric specializes in selling metric fasteners you won’t find anywhere else.
Do your eyes glaze over at all the metric bolt choices? We know it can be kind of confusing, especially if you’re not used to ordering metric parts. Let’s look at the meaning of some common terms in the world of “bolt-ology.”
Bolts have different heads that identify their use for different applications. Hex bolts, for instance are simply bolts that have a hexagonal, or six-sided shape to their head. These bolts may have threads extending either halfway or all the way down the shaft and generally require nuts and washers to hold themselves in place. Flange bolts are instantly identifiable by a flat flange that somewhat resembles a washer peeking out from underneath the head but is actually part of the head itself. The flange grips onto the substrate and distributes the clamping force across it just as a washer would, saving you the need for that separate part.
No provider of metric fasteners would be complete without a full line of metric nuts, and at Mr. Metric we have more nuts stored away than a squirrel at wintertime. But what do all these different nuts do, and which type or types do you need to purchase? Let’s take a glimpse at the world of nuts.
There’s no single, universal steel. The fact that steel is an alloy, a mix of different elemental minerals, practically guarantees that there is more than one way to make the stuff. As a result we have steel in a variety of compositions, each of which can withstand a certain amount of abuse and perform well under specific conditions. We assign grades to steel to make these differences clearer. Generally, the more carbon a steel fastener contains, the more it can be hardened, and the addition of other metals may provide other desirable qualities as well.
If the metric fasteners we sold at Mr. Metric always made their home in stationary applications or objects, we might never have to worry about them losing their grip over time. Unfortunately the real world doesn’t stand still, and even the highest-quality screws in the world can come loose if the components it joins are subjects to constant vibration. Engines, motors and the parts attached to them vibrate pretty much whenever they’re in use. What’s the solution? Nylon-patched screws.
Metric Fasteners and Torque
Applying the right torque to a fastener is something of a balancing act. Add too little torque and your fastener becomes a “non-fastener “– it simply slides back out of the hole. Add too much torque, however, and the force may be more than the screw can bear, causing stripped threads or even outright breakage. The materials that make up the fastener will have some say in how much torque you can safely apply. Nylon and softer metals will enjoy less torque tolerance than, say, stainless steel. Automated assembly lines for specific applications have to be told how much torque to apply. Once the ideal amount of torque is known for a particular assembly or sub-assembly, the machines that drive the fasteners into place can then deliver that precise amount every time.
While we sell all kinds of metric fasteners here at Mr. Metric, the most popular of all our metric screws are our metric socket head cap screws. Why does this product stand out as a popular favorite? The answer, in a word, is versatility.
If you go to this section on our website, you’ll see several different categories of socket head cap screws, including flat head screws, button head screws, pipe plug screws, dog screws, shoulder screws and others. While the sheer variety may seem confusing, all socket head cap screws share certain general characteristics.. These screws have a rounded cap-shaped head with a six-sided hex drive to accommodate an Allen socket wrench. Side grooves on the cap also allow you screw it in manually if you don’t have a screwdriver on you.
If you want to mate two pieces of an assembly together with perfect accuracy and minimal “play,” you need metric dowel pins. These pins are short versions of dowel rods — cylindrical lengths of a solid material driven into the matching holes of two components to hold those components together accurately. You’ve doubtless worked with dowel pins, either wooden or metal, every time you had to assemble a prefabricated desk or other piece of furniture. Metal dowel pins are used to hold stonework together. And of course steel metric dowel pins are everywhere in the world of machinery production.
If you want to boost the speed and efficiency of your assembly processes, you should look into SEMS, or “pre-asSEMbled” fasteners. These handy devices combine the screw and the washer into a single component, eliminating the need to match the right items up and slip the washer into place by hand. It also simplifies your inventory by giving you one part to track and purchase instead of two. SEMs have been around since the 1930s and come in inch-measure or metric varieties. (Guess which kind we sell!)
SEMs typically come with some form of lockwasher to prevent slippage once the screw is firmly secured. Two popular choices include internal-tooth and external-tooth lockwashers. Internal-tooth SEMs have teeth inside diameter of the lockwasher to bite into the substrate and hold the washer in place, while external-tooth SEMs perform the same task with teeth extending from the outside diameter of the washer.