4 x 3/4" Pozidriv CSK Wood Screws Zinc (Box of 200)
In stock
Delivery Information
| Delivery Time Frame | Delivery Information |
| Next Working Day By 1PM | When an order is placed by 3pm for next working day on certain items |
| Standard Delivery | Usually delivered in 2 to 4 working days |
| Delivery Charges | |
| UK Mainland | Prices start at £3.95 for very small items, £6.50 for small, £9.50 for medium and £20 for large/long items |
| Scottish Highlands & Islands, Northern Ireland & Ireland | Prices from £30, please see our delivery page for more info. |
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Description
Reliable Joinery Fastening with Professional Twin-Thread Wood Screws
Securing light timber trim, small hinges, and hardware brackets often presents subtle trade challenges. When you drive small fixings into natural softwood or man-made boards, inferior fasteners can split the timber, cam out under driver pressure, or shear at the neck. The 4 x 3/4" Pozidriv CSK Wood Screws Zinc (Box of 200) tackle these daily assembly snags directly, offering tradespeople and dedicated DIYers an efficient, dependable fixing designed for immediate grip and a flush finish.
Manufactured to gauge 4 dimensions, measuring 3.0 mm in diameter by 20 mm in overall length, these fixings integrate a fast-starting 25 degree point with twin-lead threads. This configuration pulls the screw into timber twice as quickly as traditional single-thread screws while generating substantial pull-out resistance. The classic parallel shank maintains a steady grip along its entire shaft, preventing loose fixings when mounting items such as cabinet stays, light catches, miniature backplates, or electrical accessories.
Equipped with a bright zinc-plated passivated finish, this box of 200 wood screws delivers essential corrosion resistance for dry internal environments. Whether you are carrying out workshop joinery or installing light fittings into masonry alongside compatible plastic wall plugs, these fasteners provide a neat, countersunk seating that will not distort your timber surfaces or tear up your screwdriver bits.
Stage-by-Stage Fastener Execution Pipeline
Stage 1: Accurate Positioning and Point Piercing
The sharp 25 degree gimlet point allows accurate positioning on timber without wandering across the grain. The single leading thread bites instantly into wood fibres or composite surfaces, removing the need for pilot drilling in softwoods. This immediate grab speeds up repetitive installations on joinery benches and site builds.
Stage 2: Positive Pozidriv No.1 Bit Engagement
The precision-formed PZ1 recess delivers parallel drive contact that eliminates cam-out and slippage under high torque. Combined with a double countersunk head design, this recess reinforces the screw neck against torsional stress, preventing frustrating head shear when driving into harder knots or tough plugs.
Stage 3: Rapid Twin-Thread Advancement
Featuring dual 60 degree threads cut alongside a uniform parallel shank, the screw advances at twice the speed of single-thread variants per rotation. The thread profile compresses timber fibres smoothly, reducing split hazards while establishing high pull-out resistance inside softwoods and standard wall plugs.
Stage 4: Clean Flush Countersinking
The countersunk head draws neatly below the timber surface without tearing or fraying the perimeter grain. This flush seat provides a clean appearance on visible decorative mouldings and leaves hinge leaves and hardware plates sitting flat, ready for smooth mechanical operation.
Detailed Specifications
| Specification | Rating or Standard | Practical Details |
|---|---|---|
| Nominal Dimensions | Imperial 4 x 3/4" (Metric 3.0 x 20 mm) | Calculated total length including countersunk head, suited for shallow timber fastenings. |
| Recess Drive Type | Pozidriv PZ1 Cross Recess | Provides positive engagement, resisting driver slip and premature wear. |
| Head Configuration | Double Countersunk | Thickened neck profile reduces head shear and creates a neat flush surface finish. |
| Thread Architecture | 60 Degree Twin-Thread Parallel Shank | Drives at twice the speed of single-thread screws with superior holding power. |
| Point Angle | 25 Degree Sharp Point | Single leading start thread for rapid initial penetration into softwoods. |
| Surface Finish | Bright Zinc Plated (BZP) | Protective barrier suitable for internal joinery, furniture, and dry applications. |
| Substrate Compatibility | Timber, Chipboard, Masonry with Wall Plug | Optimised for natural softwoods, composite panels, and light masonry fixings. |
| Packaging Quantity | Box of 200 Pieces | Supplied in a sturdy storage box for tool bags and trade vans. |
Key Applications and On-Site Versatility
The 4 x 3/4" Pozidriv CSK Wood Screws Zinc (Box of 200) serve a broad selection of light-duty trade jobs. Because the 20 mm shank length avoids bursting through standard 15 mm or 18 mm cabinet panels when fitting hardware, these fixings are widely chosen for fixing cabinet magnetic catches, small flush hinges, miniature brackets, and secondary cupboard catches.
Beyond panel work and cabinetmaking, these twin-thread screws perform reliably in masonry installations when paired with yellow or red plastic wall plugs. The parallel shank expands the plastic plug sleeve evenly along the drilled hole, delivering firm anchorage for electrical conduit saddles, lightweight trunking, picture rails, and decorative beading.
Installation Best Practice
For optimal driving performance, always ensure your drill driver or hand screwdriver uses a genuine PZ1 driver bit. While traditional slotted or Phillips drivers may appear to fit, only a true Pozidriv profile matches the radial ribs of the recess. Setting your drill clutch to a light torque setting prevents over-driving into softer timbers, keeping your joinery neat and structurally sound.
Not sure if this fixing is right for your requirements?
If you need guidance on screw sizing, drill bit selection, or suitable wall plugs for your project, please contact our friendly team today.
Contact Our TeamSpecification
| Manufacturer | Timco |
|---|---|
| Finish | Zinc |

