* Head: Countersunk Pozi-drive * Finish: Zinc Yellow Passivated * Use in softwoods, hardwoods, chi...* Head: Countersunk Pozi-drive * Finish: Zinc Yellow Passivated * Use in softwoods, hardwoods, chipboards and fibreboards * Extra deep Pozi recess * Wax coating, increased speed A firm favourite among trade pros! These single thread multi-purpose wood screws are incredibly versatile, and suitable for a wide variety of fixing tasks - use them with softwoods, hardwoods, chipboards and even fibreboards. The screw's extra deep insert bit recess enables a firmer positive drive, for quicker and easier insertion. The single thread and special wax coating only speeds things up even further - get the job done right, in less time and with less effort. As well as performance, you'll get durability too. The screws offer more corrosion resistance than other zinc-plated products thanks to an additional passivation process. No matter what the trade, these wood screws won't let you down.* Single thread multi-purpose wood screws - highly versatile* Perfect for fixing into softwoods, hardwoods, chipboards and fibreboards* Extra deep insert bit recess for a firmer positive drive for quicker and easier insertion* Single thread and special wax coating for quicker and easier insertion* Increased holding power when used with particle boards like MDF* Zinc yellow passivated finish for greater corrosion resistance* Countersunk pozidriv-compatible recessed head* Perfect for a huge variety of fixing applications FandF Single Thread Countersunk Pozi Screw 3.5 x 20mm (200 Pack) in Gold
Forge MPS3520Y Multi-Purpose Pozi Screw CSK ST ZYP 3.5 x 20mmBox of 200 These Forgefix Multi-Purpose Pozi Screws with countersunk headshave a zinc...
Multi-Purpose Pozi Screw Countersunk ST ZYP 3.5 x 20mm Box 200These Forgefix, Multi-Purpose Pozi Compatible Screws feature a countersunk, pozidrive compatible, recessed head. They have a zinc yellow passivated finish offering more corrosion resistance than zinc plated products, thanks to an additional passivation process. They offer quick and easy insertion due to an extra deep insert bit recess, enabling a firmer, more positive drive. The single thread, and special wax coating, increase speed and ease of insertion. The single thread design also provides increased holding power, particularly when used with particle boards like MDF. The Forgefix screws are highly versatile and immensely popular, these single thread screws are perfect for a whole host of fixing needs, and are ideal for fixing into a range of substrates including softwoods, hardwoods, chipboards and fibreboards. They are suitable for numerous ironmongery, joinery, electrical and plumbing applications.
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Product Information
Full details
The ForgeFix Countersunk Pozi Screw 3.5 x 20mm Yellow is a versatile fastener designed for a wide range of woodworking and general fixing applications. Ideal for DIYers and professionals alike, these screws offer quick and easy insertion with enhanced holding power, making them a reliable choice for various materials. While highly adaptable, optimal performance requires the use of a compatible Pozi drive bit.
All features
Colour
Yellow
Model Part Number
MPS3520Y
Brand
Forgefix
Extended Product Information
FAQs
What kind of driver bit do I need for these screws?
These screws require a compatible Pozi drive (PZ) bit. Look for the PZ symbol and ensure the bit size matches the screw head (e.g., PZ1 for smaller screws, PZ2 for larger common sizes).
Are these screws suitable for outdoor use?
The zinc yellow passivated finish provides enhanced corrosion resistance, making them suitable for some indoor and sheltered outdoor applications. However, for permanent, direct exposure to harsh outdoor weather or marine environments, a specialized exterior-grade screw (e.g., stainless steel) is recommended.
Do I need to pre-drill a pilot hole before using these screws?
While the wax coating aids in insertion, pre-drilling is highly recommended for hardwoods to prevent splitting and reduce driving effort. For softwoods and particle boards, pre-drilling is often optional but can prevent splitting, especially when screwing close to edges.
What materials can these screws be used with?
These screws are highly versatile and can be used with a wide range of wood-based materials, including softwoods, hardwoods, chipboards, and fibreboards like MDF and plywood.
What is the quantity of screws in one box?
Each box of ForgeFix Countersunk Pozi Screws 3.5 x 20mm Yellow contains 200 screws.
What is the difference between Pozi and Phillips drive types?
Both Pozi and Phillips have a cross-head recess. However, Pozi-drive (PZ) has four additional small nicks between the main slots, which provide a better grip and reduce cam-out compared to Phillips (PH) heads. Always use the correct bit type for the screw head to ensure optimal driving and prevent damage.
Troubleshooting
Screw head is stripping/camming out during driving.
Ensure you are using the correct size Pozi drive bit (PZ) for the screw. Apply firm, consistent pressure to keep the bit fully engaged in the screw head. Reduce drill speed if using a power tool.
Screw is difficult to drive in, or material is splitting.
Consider pre-drilling a pilot hole, especially when working with hardwoods or near edges of any wood type. The pilot hole should be slightly smaller than the core diameter of the screw.
Screw breaks during insertion.
This can happen if the pilot hole is too small, or if excessive force is applied. Ensure the pilot hole is appropriate for the screw size and material. Avoid over-tightening, especially with power tools.
Screw does not hold firmly in the material.
Verify that the material is suitable for screw fastening. If using in softer or compromised material, ensure the screw length is adequate for proper thread engagement. For particle boards, the single thread design should offer good hold, but very weak or rotten wood will not provide sufficient purchase.
Pros and Cons
Pros
Enhanced Corrosion Resistance: Zinc yellow passivated finish helps prevent rust, extending the life of the fixings.
Effortless Installation: Special wax coating and deep recess allow for quick, easy, and secure driving, reducing effort.
Superior Holding Power: Single thread design provides strong grip, especially beneficial in demanding materials like MDF.
Broad Material Compatibility: Reliably performs in a wide range of wood types and engineered boards.
Versatile Use: Suitable for diverse professional and DIY applications, from furniture assembly to electrical fixture installation.
Cons
Requires Specific Driver Bit: Optimal performance necessitates a Pozi drive bit; standard Phillips bits may lead to cam-out.
Limited Outdoor Exposure: While corrosion-resistant, they are not designed for permanent, direct exposure to harsh outdoor elements without additional protection.
Not for Masonry/Metal: These screws are primarily for wood and wood-composite materials and are not suitable for direct fastening into masonry or metal without appropriate anchors or pre-drilling.
Setup, Compatibility & Care
Setup
Select the Right Bit: Ensure you use a compatible Pozi drive bit (often labeled PZ1 for this size, but check screw head for match). Using a Phillips bit may cause cam-out and damage the screw head.
Pre-Drilling (Optional but Recommended for Hardwoods): For hardwoods or to prevent splitting in softwoods, especially near edges, it is advisable to pre-drill a pilot hole. The drill bit size for the pilot hole should be slightly smaller than the screw's core diameter (excluding threads).
Driving the Screw: Insert the screw into the pilot hole (if pre-drilled) or directly into the material. Apply firm, steady pressure with your drill or screwdriver, ensuring the Pozi bit is fully engaged in the recess. Drive until the countersunk head sits flush with the material surface.
Compatibility
Materials: Compatible with softwoods, hardwoods, chipboards, and fibreboards (e.g., MDF, plywood).
Tools: Requires a Pozi drive bit (PZ) for installation. Suitable for use with manual screwdrivers, cordless drills, and impact drivers.
Care
Storage: Store screws in a dry environment to maintain their zinc yellow passivated finish and prevent premature corrosion. Keeping them in their original box or a sealed container is ideal.
Handling: Avoid unnecessary exposure to moisture or harsh chemicals, which could compromise the protective coating.
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