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.
One fastener does not fit all. Do you have the right ones for your needs?
Many of the screws we sell work for a wide range of applications. Examples of good general-purpose fasteners include our line of metric pan screws, which come in slotted, Philips or Torx varieties. If you don’t have, say, a truss, or binding head screw, you can most likely drop one of these in as a substitute. Other screws, however, work well in one type of situation but not in another.
Need a professional grade torque wrench to tighten up your metric fasteners? Look no further than MountzPro! These are the official torque wrenches used by Mr. Metric, especially for automotive uses. Whether he is working on a hobby project in the garage or working down at the shop, he always has a MountzPro professional torque wrench in hand.
MountzPro has two great models to fit your individual needs. Their True Dual Scale Torque Wrench is unlike other dual scale wrenches. This torque wrench is calibrated and certified in both the American and S.I. scale. for easy calibration with minimal hassle. Continue reading
Mr. Metric’s Custom Services for Metric Fasteners
You may have noticed that Mr. Metric offers plating among its other custom services for its clients. This means you can choose from a plethora of zinc, cadmium, gold, nickel, chrome and other finishes for your metric bolts, metric washers and metric nuts. But why does the choice of plating matter — and how do you know what kind of plating to select?
Plating is simply covering a conductive surface with a metallic coating, such as hot-dip galvanization to coat a steel fastener with a layer of zinc, or electroplating to add a layer of cadmium or chromium. We do this to take advantage of some desirable characteristic in the plating material. Sometimes that characteristic is purely cosmetic. If you want a bright, shiny look to your screw heads, get them plated in chrome. If you want black fasteners without having to paint them, order them in black zinc.
Metric fasteners seem simple enough until it’s time for you to actually select the exact kind that you need. There are actually a wide variety of types, styles and grades to choose from. This is not only true of metric bolts or metric screws – it also applies when you’re looking for the right metric washer for the job. Flat washers, curved washers, split washers, internal and external washers – what’s the difference?
Let’s take a look at the various categories offered by Mr. Metric. Our best seller is the good old flat washer, a thin, flat metal sphere with a large hole cut in its center. This versatile washer provides plenty of tension between the head of a screw or nut and the substrate for general-purpose applications. Curved washers and wave washers exert a lighter thrust load than flat washers and are used in rotating mechanisms such as bearings, motors and seals.
Sometimes modifying an assembly with a convenient, affordable “add-on” part just makes more sense than making your machining operations even more complex than they already are. For instance, if you need to create a shoulder on a shaft or inside a bore, you have to use more total material and spend extra machining the shoulder, both of which will cost your business extra money. It can be a lot cheaper and easier to fit the shoulder on as a separate piece. So here at Mr. Metric we offer internal and external retaining rings for just that purpose.