sourcingmap M2 x 7mm 304 Stainless Steel Phillips Pan Head Screws Bolt 60pcs

Product Information

Yellow wall plugs are suitable for screws with a diameter of 3.0mm to 4.5mm and require a 5mm drill bit for installation. They can support weights of up to 5kg, making them ideal for lighter items such as picture frames or small shelves. When installing a yellow wall plug, it is important to ensure that the plug is at least the same length as the screw you’ll be using. If the wall plug is too short, it won’t be able to provide enough support for the screw, and the item may not be securely mounted to the wall. Red Wall Plug While it is possible to screw timber without a pilot hole, I would always recommend you do drill a pilot hole. Your project will be much neater and less likely parts of the timber will split. Does This Mean I Need 2 Holes For Every Screw? The screw diameter or major diameter is the outside diameter of the screw. In other terms, it’s the diameter of the screw shank. Calculate Pilot Hole Size: The general rule of thumb is to use a pilot hole that is about 75-80% of the screw diameter. So, for a 5mm screw, you’d calculate it as follows:

To do this, simply hold the screw up to the light, then hold a drill bit up in front of the screw. If the drill bit diameter covers the shank of the screw while showing the threads, you have the correct drill bit to use. Unlike imperial callouts, the metric screw size callouts always start with the letter M followed by a number. This number is the screw diameter. For this, you are going to need 2 drills. Most people have at least 2 drills or more in their workshop. If you don’t, I do suggest grabbing another one as it will make your life a lot easier. These are the ones I use and recommend. If you’re used to using the imperial screw sizes, reading screw sizes in mm might be confusing to you.It is very helpful to know the decimal equivalent for a US screw size you have. That is often found when trying to match a screw size using Digital Calipers (Inch Decimal to Screw Size) or drill a hole (Screw size to Nearest Fraction) for your project.

Typically, screw callouts contain three numbers whether for imperial or metric ones. Metric callouts usually contain:Just like pilot holes and clearance holes, there is an easier way to drill a pilot hole and countersink hole in one. The image below shows the drills I have in my workshop which are very handy. Drill bits with countersink in one The correct size pilot hole for a 4mm screw is 3.2mm. Using the above rule that a pilot hole should be 75-80% of the screw diameter, you work this out using this method: 4mm x 80% = 3.2mm. What Size Pilot Hole For 6mm Screw? The screw length is the third and final number you find in metric callouts. It’s measured differently depending on the type of the screw head.