Alexei Volkov
Molly bolts, also known as molly screws, are a type of screw fastener used to attach objects to plaster or gypsum board hollow walls. They are used to hang moderate weight objects on walls. They work by anchoring themselves inside a hole and expanding once in position. To install a plastic molly screw, first, determine the appropriate size of the molly bolt required for the weight of the object you intend to hang. Then, follow the manufacturer's directions to pre-drill a hole to the correct width. Insert the molly bolt into the hole and use a screwdriver to tighten the screw to expand the anchor in the wall. Finally, hang your desired object, ensuring it's not too heavy for the bolt.
| Characteristics | Values |
|---|---|
| Type | Screw fastener |
| Use | Attach objects to plaster or gypsum board hollow walls |
| Installation | Insert the screw into the Molly bolt, push it into the space, and screw the bolt in place |
| Tightening | Use a slotted screwdriver to avoid slipping and causing damage |
| Weight Support | Supports moderate weight; larger sizes can support heavier objects |
| Removal | Twist the top off with needle-nose pliers or drive it into the wall with a screwdriver |
| Alternatives | Toggler, zip toggle, snap toggle, or strap toggle |
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What You'll Learn
Choosing the right plastic molly screw
When choosing the right plastic molly screw, there are several factors to consider. Firstly, it is important to assess the type of wall you are working with. Molly screws, also known as molly bolts, are specifically designed for use with hollow walls made of plaster or gypsum board. They are not suitable for concrete or brick walls, which require special concrete expansion anchors.
Secondly, consider the weight of the object you plan to hang. Molly bolts are suitable for lightweight to mid-weight objects, with plastic molly bolts typically holding up to 10 pounds. For heavier objects, metal molly bolts made of zinc-plated steel are recommended, as they are rated to hold greater weights. If you are unsure about the exact weight of the object, it is advisable to choose an anchor with a higher weight limit for safety.
Thirdly, the thickness of the drywall is a crucial factor. Molly bolts come in different sizes to accommodate varying drywall thicknesses, typically ranging from 1/8" to 1/4" for original-style molly bolts. Drive molly bolts, on the other hand, are designed for specific drywall thicknesses of 1/2" and 5/8".
Additionally, the location of wall studs is an important consideration. While molly bolts are designed for use where there are no studs behind the drywall, attaching to a stud may be necessary for additional support when hanging heavy objects.
Lastly, the type of screw and installation process should be considered. Molly bolts require a pre-drilled hole in the drywall, and the size of the drill bit should match the recommendations on the packaging. When installing the screw, it is recommended to use a slotted screwdriver to avoid slipping and causing damage to the wall. The screw is then tightened into the anchor, causing it to expand and grip securely against the inside of the hole.
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Drilling a hole
When drilling a hole, it is important to follow the manufacturer's directions to determine the correct width for the hole. The hole should be drilled to the specified width to ensure that the anchor fits snugly and does not fall out. Choosing the correct drill bit size is crucial, as a hole that is too large can cause the anchor and screw to become loose and unstable.
It is also important to identify the bottom of the anchor before drilling. Molly anchors have sharp tips at the underside that help them grip onto the drywall securely. Therefore, the orientation of the anchor must be considered during the drilling process.
Additionally, when installing molly bolts, consider the location of the studs in the wall. While molly bolts are designed for use where there are no studs behind the drywall, attaching to a stud may be necessary for additional support when hanging heavy objects.
By following these instructions and carefully drilling a hole of the appropriate size and orientation, you can ensure a secure and stable installation of the plastic molly screw.
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Inserting the screw
Firstly, you need to determine the appropriate size of the molly bolt required for the weight of the object you intend to hang. Molly bolts come in various diameters and grip lengths (also known as shank lengths) for different plaster wall thicknesses and to support different loads. Larger sizes can support heavier objects.
Once you have the correct size, follow the manufacturer's directions to pre-drill a hole to the correct width. The hole should be slightly larger than the diameter of the molly bolt's sleeve. The underside of the molly bolt has sharp tips that will help grip the wall. Insert the molly bolt into the pre-drilled hole. Use a small block of wood and a hammer to gently tap the bolt so that it sits flush with the wall.
Now you can insert the screw. Place the object you are hanging, or any supplemental hanging hardware, between the screw and the fastener. Screw the bolt in place using a screwdriver. You can use a manual screwdriver, but it is recommended to use a slotted screwdriver to avoid slipping and causing damage to the wall. Do not over-tighten the screw. As you screw, the anchor will bend, expand, spread, and grip against the inside of the hole, providing a secure hold. Stop screwing once you feel strong resistance, and the top of the molly bolt is tightly pulled against the wall.
If you are attaching a wardrobe rod, for example, and the screw won't tighten, try pulling the rod towards you as you tighten. If this does not work, the molly may have been put in backward or not grabbed the wall. Remove the molly and try again, ensuring the screw alignment is correct.
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Tightening the screw
Molly bolts, also known as molly screws, are screw fasteners used to attach objects to hollow walls. They work by anchoring themselves inside a hole and expanding once in position.
When tightening the screw, it is important to consider the location of the studs in the wall. Molly bolts are designed for use where there are no studs behind the drywall, but you may need to attach to a stud for additional support when hanging heavy objects.
To tighten the screw, first, insert the screw into the Molly bolt. Then, push it into the space you created and screw the bolt in place using a screwdriver. Be careful not to tighten it too much. The Molly bolt will flare into place at the back of the wall, creating an anchor.
If you are having trouble tightening the screw, try pulling the screw towards you as you slowly turn it a little at a time. When it gets close to the point where you can no longer turn it by hand, pull the object you are attaching towards you as you tighten with a screwdriver.
If the screw still won't tighten, the Molly bolt may not have grabbed properly or may have been put on backwards. Try removing the Molly bolt and starting again, ensuring that the screw is aligned correctly.
For heavy objects, multiple Molly bolts may be required for additional support.
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Removing the screw
Removing a plastic molly screw can be tricky and may cause damage to your wall if not done correctly. Here is a step-by-step guide on how to remove a plastic molly screw:
First, identify the type of plastic molly screw you are dealing with. There are various types of molly screws, including threaded plastic, self-drilling toggle, expanding anchors, and bolts. Understanding the type of screw you are working with will help you choose the most appropriate removal method.
If you are working with a threaded plastic drywall anchor, you can start by removing any screws to access the anchor. Then, use a screwdriver that fits tightly into the anchor and tap it gently with a hammer to ensure a good hold. Apply pressure and twist the screwdriver counter-clockwise to "unscrew" the anchor. Once it is loose enough, grip the edge with needle-nose pliers and gently pull it out.
For other types of plastic molly screws, such as bolts, you can screw out the bolt until it is loose. Then, gently pry on the plastic hanger using a pry bar, claw hammer, or similar tool. Press (don't screw or hammer) the bolt back into the wall while prying out the plastic. This process may not return the anchor to its original shape, but it should allow you to pull it out without enlarging the hole. Remember to protect your wall from the prying tool to avoid unwanted marks.
In some cases, you may need to use a sharp blade to cut the anchor without damaging the surrounding wall. If the anchor is protruding, you can use a utility blade to slice off the edge. Once the anchor is no longer overlapping the drywall, use a small screwdriver and a hammer to push the anchor deeper into the wall. This will allow you to patch the drywall and conceal the anchor.
It is important to note that some plastic molly screws, especially those supporting heavy items, may be difficult to remove and may need to be recessed or cut out instead. Always exercise caution and consider the weight of the supported items before attempting removal. If you are unsure, it may be best to consult a professional or seek further advice.
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Frequently asked questions
A plastic molly screw, also known as a molly bolt, is a type of screw fastener used to attach objects to plaster or gypsum board hollow walls.
First, determine the appropriate size of the molly bolt required for the weight of the object you intend to hang. Molly bolts come in various diameters and grip lengths (shank lengths) for different plaster wall thicknesses and to support different loads. Then, follow the manufacturer's directions to pre-drill a hole to the correct width. Insert the molly bolt into the hole and use a screwdriver to tighten the screw to expand the anchor in the wall.
Plastic molly screws are more durable and reliable than regular screws. They are designed to anchor themselves inside a hole and expand once in position, providing a more secure and permanent solution for hanging objects on hollow walls.
One common issue is that the screw won't tighten in the molly. This could be because the molly didn't grab or was put on backwards. Another issue is that the plastic anchors are not suitable for drywall and may not be able to support heavy objects.
Molly bolts and screws are available at hardware stores and online retailers such as Amazon and Lowe's. They are typically sold in kits or sets with various sizes included.
