KYA 3.5x25mm Self-Drilling Drywall Screws are plastic-belt collated screws designed for efficient installation with compatible autofeed screw guns. The featured screw has a 3.5mm diameter, 25mm / 1 inch length, bugle head and self-drilling point.
Manufactured from C1022A steel, the screws are available with black phosphate, grey phosphate, yellow zinc or blue-white zinc finishes. The 25mm configuration is primarily relevant for drywall and gypsum-board fastening where the material thickness, metal framing and required screw penetration suit a 1-inch self-drilling fastener.
Each current KYA 3.5×25mm configuration is packed at 1,000 screws per box, 10,000 screws per carton and 240,000 screws per pallet. The listed screw weight is approximately 1.27g per piece.
| Specification | Details |
|---|---|
| Product Type | Collated Self-Drilling Drywall Screw |
| Primary Size | 3.5mm × 25mm / approximately .138" × 1" |
| Diameter | 3.5mm |
| Length | 25mm / approximately 1" |
| Material | C1022A Steel |
| Head Type | Bugle Head |
| Point Type | Self-Drilling Point |
| Thread Type | Thread pitch is not specified in the available product data; confirm the current production specification when thread geometry is critical |
| Drive / Recess | Confirm current production specification before cross-brand tool qualification |
| Collation | Plastic Belt / Collated Strip |
| Available Finishes | Black Phosphate, Grey Phosphate, Yellow Zinc, Blue-White Zinc |
| Box Quantity | 1,000 pcs |
| Carton Quantity | 10,000 pcs |
| Pallet Quantity | 240,000 pcs |
| Listed Screw Weight | 1.27g / pc |
| Primary Application | Drywall / gypsum board fastening to suitable metal framing |
| Required Tool | Compatible autofeed / collated screw gun matched to the screw strip and 25mm length |
Compatibility note: tool brand alone does not establish compatibility. Confirm screw length, diameter, drive type, plastic-strip geometry, strip pitch and magazine specification before using KYA collated screws in another manufacturer's autofeed system.
Request 3.5x25mm Screw Pricing 
A self-drilling drywall screw uses a drill-style point intended to penetrate compatible metal framing without a separate pilot hole. This makes it different from a conventional sharp-point drywall screw, which is generally selected for wood framing or thinner metal depending on the screw specification.
For drywall-to-metal installations, the screw point, thread, diameter and drilling capacity must match the steel framing thickness. This product is identified as self-drilling, but a verified maximum metal drilling thickness is not specified in the available product data. Confirm the allowable steel thickness or gauge before selecting the screw for a specific metal-stud application.
| Feature | Self-Drilling Drywall Screw | Sharp-Point Drywall Screw |
|---|---|---|
| Point | Drill-style point | Sharp / needle-style point |
| Primary Substrate | Compatible steel framing | Wood framing or lighter metal depending on specification |
| Pilot Hole | Designed to drill its own entry hole within its rated capacity | Penetrates through its pointed geometry rather than a drill tip |
| KYA 3.5x25mm Configuration | Featured configuration | Separate sharp-point fastener type; not this self-drilling configuration |
The bugle head has a curved underside designed to seat into gypsum-board facing with a gradual transition between the head and shank. Correct depth adjustment allows the screw head to sit slightly below the board surface without excessive penetration through the paper facing.
A bugle head should not be driven so deeply that it tears completely through the face paper. Autofeed screw guns with consistent depth control can help installers maintain repeatable screw setting during high-volume drywall work.
Collated screws are held in a continuous plastic strip for automatic or semi-automatic feeding. This reduces the need to load individual screws and can improve productivity on repetitive drywall installations.
Reliable autofeed performance depends on more than the screw itself. Strip pitch, plastic carrier dimensions, screw alignment, drive recess, screw length and the feed mechanism all have to match the screw gun or magazine.
KYA references Makita, Hilti, SENCO, Festool, Hitachi, Ridgid and Bosch autofeed systems as potential tool-brand references. Compatibility is not universal and must be checked against the exact screw length, drive type, strip geometry, strip pitch and magazine specification.
| Tool / System | Compatibility Guidance |
|---|---|
| SENCO DURASPIN 1"–2" Systems | Current SENCO tools and attachments can accept screws beginning at 1 inch on selected models, but the KYA plastic strip, drive recess and feed geometry must still be verified before substitution. |
| Hilti SD-M Systems | Hilti offers collated drywall systems using proprietary magazine-compatible strips. Do not assume KYA strips fit solely because both products are 25mm collated drywall screws. |
| Makita Autofeed Systems | Confirm accepted screw length, strip dimensions, screw diameter and required bit before use. |
| Festool / HiKOKI / Ridgid / Bosch Systems | Verify the exact autofeed attachment or screw-gun specification rather than relying on brand name alone. |
| Other Collated Screw Guns | Provide the exact tool manufacturer and model to confirm strip and fastener compatibility. |
Trademark note: DURASPIN is SENCO's collated screw system. KYA supplies collated / autofeed drywall screws; compatibility with a specific SENCO DURASPIN tool should be confirmed by model and strip geometry.
The clearest application for a self-drilling bugle-head drywall screw is fastening gypsum board to compatible metal framing. The self-drilling point forms its own entry through the metal within the screw's rated drilling capacity, while the bugle head seats into the drywall surface.
A verified metal-thickness range for the 3.5×25mm product is not specified in the available product data. Buyers should provide the steel-stud thickness or gauge when requesting compatibility confirmation.
The 25mm length is relatively short. Correct screw length depends on the drywall thickness, any additional board layers and the penetration required into the framing member.
| Selection Factor | Why It Matters |
|---|---|
| Drywall Thickness | The board consumes part of the 25mm total screw length before the drill point reaches the steel framing. |
| Single vs Multiple Layers | Multi-layer gypsum installations generally require a longer screw. |
| Metal Stud Thickness | The drilling point must be suitable for the actual steel thickness. |
| Required Thread Engagement | Enough threaded length must engage the framing after the screw passes through the board. |
| Tool Minimum Length | The autofeed magazine must support a 25mm / 1-inch screw. |
| Finish | General Selection Guidance |
|---|---|
| Black Phosphate | Common interior drywall finish; not intended as a substitute for a high-corrosion exterior coating. |
| Grey Phosphate | Interior finish option for drywall applications where the project permits phosphated carbon-steel screws. |
| Yellow Zinc | Zinc-plated option providing greater corrosion protection than bare steel; confirm coating requirement for the application. |
| Blue-White Zinc | Zinc-plated option for applications requiring a plated surface; exact corrosion performance depends on coating specification. |
Coating thickness and salt-spray test duration are not specified in the available product data. Where a corrosion-performance requirement applies, confirm the production coating specification or relevant test report before ordering.
KYA lists cement board and Hardie board among possible applications. However, fiber-cement and cement-board manufacturers can specify particular head geometry, corrosion resistance, screw diameter, thread and penetration requirements.
Use this 3.5×25mm drywall screw for cement-board applications only when the board manufacturer and installation specification permit this screw type. For demanding exterior cement-board applications, a purpose-designed corrosion-resistant cement-board screw may be more appropriate.
This 3.5×25mm bugle-head drywall screw is not a general-purpose decking, step or structural-framing fastener. Decking, structural framing and load-bearing connections normally require fasteners specifically designed and rated for those applications.
Use this screw primarily for drywall, gypsum-board and compatible interior fastening applications. Other substrates or structural uses require a separate technical specification confirming suitability.
The following table shows KYA's broader collated drywall screw size and packing range. The featured configuration is 3.5×25mm; other sizes are provided as family-level selection references.
| Size | Box Size | Carton Size | Box Qty | Carton Qty | Pallet Qty | Weight g/pc |
|---|---|---|---|---|---|---|
| 3.5×25mm | 56×26×3cm | 57×27×16.5cm | 1,000 | 10,000 | 240,000 | 1.27 |
| 3.5×30mm | 56×26×4cm | 57×27×21.5cm | 1,000 | 10,000 | 240,000 | 1.55 |
| 3.5×32mm | 56×26×4cm | 57×27×21.5cm | 1,000 | 10,000 | 240,000 | 1.60 |
| 3.5×35mm | 56×26×4cm | 57×27×21.5cm | 1,000 | 10,000 | 240,000 | 1.67 |
| 3.5×38mm | 56×26×5cm | 57×27×26.5cm | 1,000 | 10,000 | 240,000 | 1.86 |
| 3.5×42mm | 56×26×5cm | 57×27×26.5cm | 1,000 | 10,000 | 240,000 | 1.99 |
| 3.5×45mm | 56×26×5cm | 57×27×26.5cm | 1,000 | 10,000 | 240,000 | 2.10 |
| 3.5×50mm | 56×26×6cm | 57×27×31.5cm | 1,000 | 10,000 | 240,000 | 2.42 |
| 3.5×55mm | 56×26×6cm | 57×27×31.5cm | 1,000 | 10,000 | 240,000 | 2.50 |
| 3.5×60mm | 56×26×8cm | 57×27×25.5cm | 1,000 | 6,000 | 108,000 | 2.89 |
| 3.5×75mm | 56×26×8cm | 57×27×25.5cm | 1,000 | 6,000 | 108,000 | 3.30 |
| Packing Parameter | 3.5x25mm |
|---|---|
| Box Size | 56 × 26 × 3cm |
| Carton Size | 57 × 27 × 16.5cm |
| Screws per Box | 1,000 pcs |
| Screws per Carton | 10,000 pcs |
| Screws per Pallet | 240,000 pcs |
| Listed Weight | 1.27g per screw |
| Ordering Information | What to Provide |
|---|---|
| Size | 3.5mm × 25mm / approximately .138" × 1" |
| Point | Self-Drilling |
| Head | Bugle Head |
| Material | C1022A Steel |
| Finish | Specify Black Phosphate, Grey Phosphate, Yellow Zinc or Blue-White Zinc |
| Thread | Specify required thread configuration and confirm current production specification |
| Drive Type | Provide required bit / recess specification |
| Screw Gun | Provide exact manufacturer, model and autofeed attachment |
| Drywall Thickness | Provide board thickness and number of layers |
| Metal Framing | Provide steel-stud thickness or gauge if the screw is used for drywall-to-metal fastening |
| Quantity | Boxes, cartons, pallets or annual purchasing volume |
Send Your Drywall Screw Requirements
The featured KYA screw is 3.5mm in diameter and 25mm / approximately 1 inch long.
The current KYA specification lists C1022A steel.
It uses a bugle head, a common drywall screw head profile designed to seat into gypsum-board facing.
A self-drilling screw uses a drill-style point intended to penetrate compatible metal framing without a separate pilot hole, within the drilling capacity of the specific screw.
A verified drilling-capacity range is not specified in the available KYA product data. Provide the steel thickness or gauge and confirm the production specification before selecting the screw for a particular metal stud.
No. A self-drilling screw has a drill-style point for compatible metal framing, while a sharp-point drywall screw relies on a pointed tip and is commonly used for wood or lighter framing systems depending on its specification.
KYA currently lists black phosphate, grey phosphate, yellow zinc and blue-white zinc.
Do not use black phosphate as a generic exterior specification. It is primarily associated with indoor drywall applications. Exterior or highly corrosive service conditions require the fastener and coating specified for that environment.
The plastic belt holds the screws in sequence so a compatible autofeed screw gun can feed the next screw automatically during repetitive installation.
No. Compatibility depends on screw length, diameter, drive type, plastic-strip dimensions, strip pitch and the screw gun's magazine or nosepiece design.
Selected SENCO DURASPIN tools have published screw-length ranges beginning at 1 inch, but this does not prove interchangeability with every KYA strip. Confirm the exact SENCO model and strip geometry before bulk use.
Hilti uses specific collated fasteners designed for its SD-M magazine systems. Do not assume compatibility solely because both products are collated 25mm drywall screws. Compare the exact strip and fastener dimensions first.
A 25mm screw may be too short for many multi-layer installations because the screw must pass through the board layers and still provide sufficient engagement in the framing. Select length according to the complete wall assembly.
KYA lists cement board as a possible application, but cement-board manufacturers may require specific corrosion resistance, head design, thread geometry and penetration. Confirm the board manufacturer's requirements before use.
Do not assume a general drywall screw is acceptable for every fiber-cement product. Use the fastener type specified by the board manufacturer for the exact product and exposure environment.
This 3.5×25mm drywall screw is not a generic decking or step fastener. Decking normally requires a purpose-designed structural or exterior screw with suitable length, head, thread and corrosion resistance.
The 3.5×25mm KYA packing specification lists 1,000 screws per box.
The current packing data lists 10,000 screws per carton.
The current KYA specification lists 240,000 screws per pallet for the 3.5×25mm configuration.
KYA's current packing table lists approximately 1.27g per screw for the 3.5×25mm size.
Contact KYA Fasteners regarding current sample availability. For tool qualification, test the exact screw strip with the intended autofeed screw gun, drywall thickness and metal framing before bulk purchasing.
Ask About 3.5x25mm Drywall Screws
KYA supplies collated drywall screws for fastener distributors, drywall-system suppliers, construction-material distributors, screw-gun distributors and professional drywall contractors.
For quotations on 3.5×25mm self-drilling collated drywall screws, provide the required finish, exact autofeed screw-gun model, board thickness, steel framing thickness, required drive type, quantity, packing requirement and destination market.
