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KYA FST25 15 gauge concrete finish nails are hardened steel straight-strip fasteners designed for compatible 15GA FST concrete nailers. The FST25 measures 25 mm / 1 inch long with an approximately 1.8 mm shank and 2.8 mm head width.
The galvanized FST25 is intended for professional finishing and light-duty fastening applications involving suitable concrete, masonry and other hard substrates, including baseboards, moulding, furring strips, light-gauge metal components and selected wood-to-concrete assemblies.
Point style: The product description lists a chisel point, while the FST series specification chart lists a bullet point. Confirm the exact FST25 tip style before ordering.
15 gauge FST format: approximately 1.8 mm shank for compatible hardened concrete finish nailers.
25 mm / 1 inch length: compact length for trim, moulding, track and other light-duty fastening applications.
2.8 mm head width: narrow-head profile used by the FST concrete finish nail platform.
Hardened carbon steel: manufactured for fastening into suitable hard substrates with a compatible pneumatic nailer.
Galvanized finish: provides corrosion protection for suitable indoor and protected-service applications.
0° straight-strip collation: glue-collated for compatible FST-series concrete nailers.
50 nails per strip: current KYA FST-series packing specification.
1,500 nails per box: industrial packaging for contractors, distributors and professional users.
| Parameter | Specification |
|---|---|
| Model | FST25 |
| Fastener Type | Hardened Concrete Finish Nail |
| Gauge | 15 Gauge |
| Length | 25 mm / 1" |
| Shank Diameter | Approximately 1.8 mm / .071" |
| Head Width | Approximately 2.8 mm / .110" |
| Collation Angle | 0° Straight |
| Collation | Glue-Collated Straight Strip |
| Material | Hardened Carbon Steel |
| Finish | Galvanized |
| Nails per Strip | 50 pcs |
| Nails per Box | 1,500 pcs |
FST concrete nails are manufactured from hardened carbon steel so they can withstand the driving forces generated when fastening into suitable concrete, masonry and other dense substrates.
Concrete varies significantly in hardness, aggregate content and age. Fastener performance therefore depends on the substrate, nail length, embedment and driving power of the tool. Test the actual substrate before repetitive installation, particularly with very hard or brittle concrete.
The FST25 uses an approximately 1.8 mm shank diameter and 2.8 mm head width. These dimensions distinguish the FST platform from larger 14GA concrete T-nails and from ordinary angled woodworking finish nails.
When replacing an existing fastener, match the complete nail specification rather than selecting by 15GA designation alone. Shank diameter, head dimensions, strip geometry, collation and nail length must all match the nailer.
FST25 nails are supplied in straight glue-collated strips for use in compatible 15GA hardened concrete finish nailers. Each current KYA strip contains 50 nails.
The straight-strip format should not be confused with angled 15GA DA finish nails used in conventional woodworking nailers. A standard 15GA angled finish nailer should not be assumed to accept FST concrete nails.
The featured FST25 uses a galvanized surface finish to provide corrosion protection compared with uncoated carbon steel.
Galvanized does not mean universally suitable for every exterior, coastal or chemically aggressive environment. Select the fastener finish according to moisture exposure, surrounding materials and project requirements.
The KYA FST family is available in multiple lengths using the same approximately 1.8 mm shank and 2.8 mm head class. Select the length according to the material thickness, required embedment, substrate hardness and the accepted fastener range of the nailer.
| Model | Length | Inch Reference | Pcs / Strip | Pcs / Box |
|---|---|---|---|---|
| FST18 | 18 mm | 3/4" | 50 | 1,500 |
| FST20 | 20 mm | 13/16" | 50 | 1,500 |
| FST25 | 25 mm | 1" | 50 | 1,500 |
| FST30 | 30 mm | 1-3/16" | 50 | 1,500 |
| FST32 | 32 mm | 1-1/4" | 50 | 1,500 |
| FST35 | 35 mm | 1-3/8" | 50 | 1,500 |
| FST40 | 40 mm | 1-9/16" | 50 | 1,500 |
| FST45 | 45 mm | 1-3/4" | 50 | 1,500 |
| FST50 | 50 mm | 2" | 50 | 1,500 |
Baseboards and skirting: fastening suitable trim components to concrete or masonry substrates.
Wood moulding: selected wood trim and moulding attachment where the substrate and nailer are suitable.
Aluminum moulding: selected light-gauge moulding installation to compatible floor or wall substrates.
Furring strips: attaching suitable thin wood strips to concrete or masonry where 25 mm fasteners provide adequate embedment.
Light-gauge metal track: selected runner, track and light steel components to suitable concrete substrates.
Interior finishing: professional finishing and renovation work requiring hardened straight-strip nails.
Wood-to-concrete fastening: light-duty non-structural assemblies where the fastener and substrate have been tested for suitability.
FST-style hardened nails are commonly used for baseboard, skirting and moulding installation where a narrow-head fastener is required and the concrete or masonry substrate is suitable for pneumatic fastening.
For baseboard installation, adhesive may also be used as part of the installation system. The nail helps locate and retain the component while the complete attachment method should follow the project requirements.
15GA FST concrete nails are used in selected light-gauge construction work for fastening runners, light steel components and aluminum moulding to suitable floors or walls.
The FST25 should not be treated as a structural anchor. Where a connection has a specified structural load, fire-resistance requirement or approved anchorage schedule, use the fastening system required by the project documents.
The 25 mm length can be used with selected thin furring materials when it provides sufficient penetration into the base substrate. The correct nail length depends on the thickness of the attached material and the embedment required for the actual substrate.
Longer nails are not automatically better for harder concrete. Excessive length can increase driving resistance and the possibility of incomplete seating or substrate damage.
Concrete fastening performance varies with compressive strength, aggregate, substrate thickness, distance from edges and the condition of the concrete.
Before production installation, test several fasteners in the actual substrate and adjust the nail length or fastening method if nails bend, fail to seat correctly, cause excessive spalling or do not provide the required attachment.
FST25 should be used only in a nailer designed for hardened straight-strip 15GA concrete finish nails. A tool being described simply as a “15 gauge nailer” is not enough to establish compatibility.
| Tool / Platform | Published Fastener Range | FST25 Guidance |
|---|---|---|
| JITOOL CS15/50 | 15GA FST mini concrete nails from 15 mm to 50 mm. | FST25 25 mm is within the published FST range. |
| Tacwise EHS50V | Type 15G hardened concrete finish nails from 15 mm to 50 mm. | 25 mm is within the published length range; confirm strip geometry before production use. |
| Other 15GA FST Concrete Finish Nailers | Varies by manufacturer. | Confirm 1.8 mm shank, 2.8 mm head class, 25 mm length and straight-strip geometry. |
JITOOL specifies the CS15/50 as a 15GA 50 mm Mini Concrete Nailer and lists FST nails from 15 mm through 50 mm for the tool. Its FST fastener range specifically includes FST25 at 25 mm.
This makes the CS15/50 an established reference platform for the FST25 size class.
Tacwise specifies the EHS50V for 15G hardened finish nails from 15 mm to 50 mm as well as conventional 16G finish nails. Tacwise also supplies hardened galvanized 15G nails for concrete and woodworking applications.
Because different manufacturers can use slightly different strip and head geometry, verify feeding with the actual FST25 fastener before high-volume use.
| Characteristic | 15GA FST Series | 14GA ST T-Nail Series |
|---|---|---|
| Typical Shank | Approximately 1.8 mm | Approximately 2.1–2.2 mm |
| Head | Approximately 2.8 mm narrow-head class | Larger T-head geometry |
| Typical Use | Finish work, trim, moulding, light-gauge components and selected wood-to-concrete fastening | Heavier furring, track, plywood and construction fastening where a T-nail system is specified |
| Interchangeable | No | No |
FST concrete finish nails are hardened fasteners intended for suitable hard substrates. Standard 15GA woodworking finish nails are commonly angled and are designed primarily for timber trim and finish carpentry.
Do not load FST25 concrete nails into an ordinary 15GA DA angled finish nailer unless the tool manufacturer explicitly specifies the FST fastener geometry.
The current FST25 configuration contains 50 nails per straight strip and 1,500 nails per box.
For distributor and project orders, confirm the required FST length, box quantity, finish and exact concrete nailer model when requesting pricing.
| Selection Item | What to Confirm |
|---|---|
| Nailer Model | Confirm the tool is designed for 15GA hardened FST / concrete finish nails. |
| Length | FST25 = 25 mm / 1". |
| Shank Diameter | Approximately 1.8 mm. |
| Head Width | Approximately 2.8 mm. |
| Collation | 0° glue-collated straight strip. |
| Substrate | Confirm concrete, masonry or other hard substrate is suitable for direct pneumatic fastening. |
| Attached Material | Provide trim, moulding, furring strip, metal track or other material thickness. |
| Application Type | Confirm the connection is suitable for a concrete finish nail rather than a structural anchor. |
FST25 is a 15 gauge hardened concrete finish nail measuring 25 mm / 1 inch long with an approximately 1.8 mm shank and 2.8 mm head width.
FST identifies the straight-strip hardened concrete finish nail family, while 25 identifies the approximately 25 mm nail length.
It should be treated as a 15GA FST hardened concrete finish nail. It is dimensionally different from the larger 14GA ST-series concrete T-nail platform.
Yes. KYA specifies the FST family as hardened carbon-steel fasteners intended for suitable concrete and other hard substrates.
Yes. The standard FST25 described on this page uses a galvanized surface finish.
Yes. Baseboard, skirting and moulding attachment to suitable concrete or masonry substrates are established applications for the FST platform.
Yes, for selected thin furring strips where the 25 mm fastener provides sufficient embedment. Confirm the strip thickness and substrate before installation.
Yes, in compatible non-structural light-gauge runner, track and related fastening applications where the substrate and installation specification permit hardened concrete nails.
Do not treat FST25 as a universal structural anchor. Structural framing and load-rated connections can require specific anchors or fasteners with documented capacities and installation requirements.
No fastener should be assumed to work identically in every concrete mix. Concrete strength, aggregate, substrate thickness, nailer power and edge distance all affect driving performance. Test the actual substrate before repetitive fastening.
Yes. JITOOL lists FST25 25 mm within the FST15–FST50 fastener family specified for its CS15/50 15GA Mini Concrete Nailer.
Tacwise specifies the EHS50V for 15G hardened finish nails from 15 mm through 50 mm, so 25 mm is within its published length range. Confirm strip and head geometry before high-volume use.
No. Ordinary 15GA woodworking finish nailers can use different angled strips and nail geometry. Use an FST25 only in a tool specified for compatible hardened straight-strip concrete finish nails.
The FST platform uses approximately a 1.8 mm shank and narrow 2.8 mm head class. Typical 14GA ST concrete T-nails use a thicker approximately 2.1–2.2 mm shank and larger T-head. Their corresponding nailers are different.
The current KYA specification lists 50 FST25 nails per strip.
The current KYA specification lists 1,500 nails per box.
The current KYA range on this product family includes 18, 20, 25, 30, 32, 35, 40, 45 and 50 mm lengths.
Choose according to the thickness of the material being attached, required embedment, substrate hardness and the nail lengths accepted by the tool. Longer nails are not automatically better for harder concrete.
Provide the required FST length, quantity, concrete nailer model, attached material, substrate type, installation application and destination market.
Ask About FST25 Concrete Nails
KYA supplies FST25 1" 15GA hardened galvanized concrete finish nails for construction fastener distributors, interior contractors, light-gauge installers and professional fastening users. Send your quantity, nailer model, substrate and application details to confirm the appropriate FST configuration.
