Fischer PowerFast FPF II CTF 4.0 x 40 BC 200 - Chipboard Screws for Wood Construction

Fischer PowerFast FPF II CTF 4.0 x 40 BC 200 is a box of 200 chipboard screws designed for structural wood connections where consistent drive behavior and approved load capacities matter. With a 4 mm diameter, 40 mm length and TX20 drive, this pack targets everyday fastening jobs in softwood, hardwood and engineered timber where a countersunk head and full thread are preferred for secure anchoring.

Design, Dimensions and Technical Approval

The PowerFast FPF II CTF BC screw combines a countersunk head, TX drive and full thread in a 4.0 x 40 mm format, making it suitable for chipboard and many wood-based panels. On the manufacturer specification page, the screw is listed with a 4 mm diameter, 40 mm length and TX20 drive, together with a thread length of 35 mm and an ETA approval for use in timber construction. The full thread runs almost the entire shank, helping to grip into chipboard and wood-based panels and distribute loads along the screw. The countersunk head sits flush in the material when the screw is driven to depth, leaving a level surface ready for covering or further assembly.

The screw is galvanically zinc-plated and blue-passivated, a surface treatment listed by Fischer as BC (blue chromate) that provides corrosion protection in interior and many covered applications. The same specification sheet notes that the PowerFast FPF II CTF BC screw is packed as a folding carton with 200 pieces per box, identified by GTIN 4048962370898 and article number 670159. ETA approval is relevant for load-bearing connections, because it confirms that the screw meets European Technical Assessment standards for certain timber applications, which many project specifications and engineers expect on structural jobs.

Materials, Use Cases and Handling

The Fischer PowerFast II design focuses on fast biting and reduced splitting in timber, particularly when used with Fischer plugs and approved loads. Fischer states that PowerFast II screws are suitable for work in coated wood, hardwood, softwood and wood connections, and the FPF II CTF BC variant is described as a galvanically zinc-plated, blue-passivated screw with full thread and TX drive. The TX20 drive, widely used in construction, provides high torque transfer and reduces cam-out compared with traditional Phillips or PZ drives, which is helpful when driving many screws or working overhead.

A comparable listing on a European retail page shows a similar PowerFast II screw pack used for wood and chipboard fastening, giving dimensions such as 4.0 mm thread diameter, 28 mm thread length and 8.0 mm head diameter for a related 4.0 x 40 mm Senkkopf model with TX drive and blue-passivated zinc surface. On that product card, the pack contains 200 screws with a weight of 515 g and approximate box dimensions of 9.0 cm height, 9.0 cm width and 11.5 cm depth. While that listing refers specifically to a CTP part-thread variant, it confirms that PowerFast II boxes in this size typically ship around half a kilogram of screws in a compact folding carton that fits easily in a tool bag or on a site shelf.

Corrosion Protection and Alternative Stainless Models

Fischer offers stainless steel PowerFast screws as alternatives when higher corrosion resistance is needed, for example in outdoor structures or humid environments. One such model is the PowerFast FPF-ST 4.0 x 40 A2P 200, a screw made from stainless steel A2 with a TX20 drive and part thread. The manufacturer page for this stainless screw lists a 4 mm diameter, 40 mm length, 24 mm thread length and 200 pieces per pack, with the screw described as suitable for all approval-relevant fixings of load-bearing components in coated wood, hardwood, softwood and wood connections.

Another stainless option is the FPF-ST 4.0 x 40 A4P 200 screw, which uses A4 stainless steel for more demanding environments. Its data sheet notes a 4 mm diameter, 40 mm length, TX20 drive and 24 mm thread length, again in packs of 200 screws with ETA approval for timber constructions. Compared with the galvanically zinc-plated FPF II CTF BC screw, these stainless variants trade the fast-biting PowerFast II full thread geometry for part thread and higher corrosion resistance, which is often preferred in exposed decking or structural applications in harsh climates.

Packaging, Identification and Market Position

Across the PowerFast range, Fischer consistently uses folding cartons that group screws by diameter, length, material and drive type. The FPF II CTF 4.0 x 40 BC 200 pack is identified by article number 670159 and GTIN starting with 4048962, making it distinguishable from stainless A2 PowerFast packs like 657040 and stainless A4 packs like 40562. On the same chipboard screw family page, Fischer lists other PowerFast II models, including a panhead TX drive version in the same 4 mm x 40 mm size with full thread and blue-passivated zinc plating, and versions with PZ cross drive for users who standardize on that bit system.

An international English page for chipboard screws PowerFast II shows a stainless A4 FPF II RTP 4.0 x 40 A4 200 model, listing a 4.0 mm diameter, 40 mm length, TX20 drive and 28 mm thread length in packs of 200 screws with ETA approval. This gives a sense of the broader PowerFast II assortment, where the FPF II CTF BC 4.0 x 40 model sits as a zinc-plated, countersunk full-thread chipboard screw aimed primarily at interior and covered timber constructions, while stainless and raised countersunk head variants target more niche use cases.

Comparison with Standard Stainless PowerFast Screws

Within the PowerFast portfolio, the FPF II CTF 4.0 x 40 BC 200 occupies a middle ground between traditional carbon steel screws and more specialized stainless versions. Compared with the stainless A2 PowerFast FPF-ST 4.0 x 40 A2P 200 screw, which uses A2 stainless steel and a part thread, the zinc-plated FPF II CTF BC screw offers a full thread with 35 mm thread length versus 24 mm thread length on the A2 stainless screw, giving more engagement in chipboard and many wood-based panels. Both screws share the same 4 mm diameter, 40 mm length, TX20 drive and 200-piece pack size, making them easy to swap in project planning when corrosion demands differ.

Stainless A4 screws, such as the FPF-ST 4.0 x 40 A4P 200, provide still higher corrosion resistance, especially in marine or heavily exposed environments, but retain the same basic dimensions: 4 mm diameter, 40 mm length, TX20 drive and 24 mm thread length with 200 screws per pack as stated on Fischer's A4 stainless data sheet. Users who work primarily indoors or in covered structures may favor the PowerFast II CTF BC screw for its full-thread design and zinc-plated surface, while keeping stainless models on hand for outdoor decks, facades or areas prone to moisture.

Category Placement and Practical Verdict

Fischer PowerFast FPF II CTF 4.0 x 40 BC 200 belongs squarely in the chipboard screw and timber fastening category, competing with other 4.0 x 40 mm countersunk-head screws that carry technical approvals for load-bearing wood constructions. The combination of ETA approval, TX20 drive, full thread and zinc-plated blue-passivated surface positions it as an everyday choice for contractors and serious DIYers who need a dependable screw in a widely used size. For users working mainly in interior carpentry, built-in furniture or covered structural elements, this screw offers a balanced mix of load capability and handling, while stainless A2 and A4 PowerFast variants become more relevant when long-term corrosion resistance in exposed environments takes priority.