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KYA FST50 15 gauge concrete finish nails are hardened straight-strip fasteners measuring 50 mm / 2 inches long. They use an approximately 1.8 mm shank and 2.8 mm head width for compatible FST-style concrete finish nailers.
As the 50 mm length option in the KYA FST range, FST50 is suited to applications requiring greater reach through thicker trim, furring strips, wood components or light-gauge materials before entering a suitable concrete or masonry substrate.
50 mm / 2" length: long FST-series option for applications requiring additional reach through the attached material.
15 gauge format: approximately 1.8 mm shank diameter for compatible hardened concrete finish nailers.
2.8 mm head width: narrow-head FST profile for finishing and light-duty construction fastening.
Hardened carbon steel: designed for driving into suitable concrete, masonry and other dense substrates.
Galvanized surface: provides corrosion protection for appropriate indoor and protected applications.
Straight-strip collation: glue-collated format for compatible FST-style nailers.
50 nails per strip: current KYA FST50 strip configuration.
1,500 nails per box: commercial packing for contractors, distributors and professional users.
| Parameter | Specification |
|---|---|
| Model | FST50 |
| Fastener Type | Hardened Concrete Finish Nail |
| Gauge | 15 Gauge |
| Length | 50 mm / 2" |
| 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 |
The 50 mm FST50 is useful when the fastener must pass through a thicker attached component before reaching the concrete or masonry substrate. Typical examples include thicker furring strips, wood profiles, selected plywood components and light-gauge construction materials.
A 50 mm nail is not automatically preferable to a shorter FST nail. The correct length depends on the thickness of the attached material, required embedment, substrate density and driving capability of the nailer.
FST50 nails are manufactured from hardened carbon steel to provide the rigidity required for direct fastening into suitable dense substrates with a compatible concrete finish nailer.
Concrete and masonry vary considerably in hardness and composition. Aggregate, substrate age, compressive strength, edge distance and nailer driving energy all affect installation performance. Test the actual substrate before repetitive fastening.
If the nail bends, fractures, does not seat correctly or causes excessive cracking or spalling, use a different nail length, tool setting or fastening method rather than increasing driving force without evaluation.
FST50 uses an approximately 1.8 mm shank diameter and 2.8 mm head width. These dimensions are characteristic of the FST concrete finish nail platform and help distinguish it from heavier concrete T-nails and conventional angled woodworking finish nails.
When replacing an existing FST nail, compare the complete fastener geometry including shank diameter, head width, length, strip format and collation before ordering.
FST50 nails are supplied in 0° straight glue-collated strips. The current KYA configuration contains 50 nails per strip for use in compatible hardened concrete finish nailers.
This straight-strip format is different from common 15GA angled DA finish nails. Do not load FST50 nails into a conventional angled woodworking finish nailer unless the tool manufacturer specifically identifies the FST fastener format.
The standard FST50 shown on this page uses a galvanized surface finish. The zinc-coated surface provides corrosion protection compared with uncoated hardened carbon steel.
Galvanized FST50 nails should not automatically be treated as suitable for every exterior, coastal or chemically aggressive environment. Fastener material and coating should be selected according to the actual exposure conditions and project requirements.
Thicker furring strips: selected wood strips where the 50 mm length provides the required reach and substrate embedment.
Baseboards and skirting: fastening thicker trim components to suitable concrete, brick or masonry.
Wood moulding and profiles: selected finishing applications requiring a longer FST fastener.
Plywood and wood components: non-structural wood-to-concrete fastening where the material thickness requires a longer nail.
Light-gauge metal track: selected runner and track fastening where the substrate and project specification permit direct hardened-nail fastening.
Aluminum profiles: selected moulding and profile attachment to compatible dense substrates.
Interior renovation: professional finishing work involving suitable concrete or masonry substrates.
The 50 mm length provides additional reach when fastening thicker furring strips compared with shorter FST25 or FST35 nails. The selected nail still needs sufficient penetration into the receiving substrate after passing through the furring material.
Very hard concrete can make a longer nail more difficult to drive. Test the actual combination of furring material, concrete and nailer before selecting FST50 for repetitive installation.
FST50 can be used for selected non-structural wood or plywood attachment where a 50 mm hardened finish nail provides appropriate penetration through the wood and into the concrete or masonry substrate.
For load-rated sheathing, structural framing, engineered connections or assemblies subject to specified wind, seismic or structural loads, use the fastening or anchoring system required by the project documentation.
FST concrete nail systems are used for selected light-gauge steel stud and runner installations, aluminum moulding and related interior profile fastening to suitable floors and walls.
For thin track or moulding, a shorter FST nail may provide sufficient penetration and easier driving. Select FST50 only where the material thickness and required embedment justify the additional length.
Direct fastening performance varies between concrete slabs, masonry blocks and brick substrates. A 50 mm hardened nail should not be assumed to penetrate every substrate simply because the nailer can load it.
Perform trial fastenings away from edges and corners. Confirm that the nail seats correctly and that the substrate does not crack, spall or break before proceeding with repetitive installation.
FST50 requires a concrete finish nailer designed for compatible hardened straight-strip fasteners and capable of accepting 50 mm nails. Gauge alone is not sufficient to determine compatibility.
| Tool Platform | Published Fastener Range | FST50 Guidance |
|---|---|---|
| JITOOL CS15/50 | Dedicated 15GA FST concrete nailer with FST fasteners through 50 mm. | FST50 is within the published FST family for this platform. |
| Tacwise EHS50V | Type 15G hardened finish nails from 15 mm to 50 mm. | 50 mm is within the published range; confirm strip dimensions when using third-party fasteners. |
| Spotnails LT50 | Concrete / masonry nailer platform using FST-style masonry nails through 50 mm. | Use as a reference platform and verify actual strip geometry before bulk use. |
| Spotnails ST-15/50 | Gas-powered masonry nailer using the same FST masonry nail family as the LT50. | Confirm actual fastener dimensions and manufacturer requirements before substitution. |
The JITOOL CS15/50 is a dedicated 15GA mini concrete nailer for the FST fastener family. Its published range includes FST50 at 50 mm together with shorter FST sizes.
Published applications for this FST platform include fastening light-gauge steel studs and runners, aluminum moulding and baseboards to suitable floors or walls.
The Tacwise EHS50V is designed to drive Type 15G hardened finish nails from 15 mm to 50 mm. Tacwise also supplies a 50 mm hardened galvanized 15G concrete finish nail in packs of 1,500.
When using another manufacturer's fastener, confirm head dimensions, shank dimensions and strip geometry with the actual nailer before production use.
The Spotnails LT50 is a concrete nailer used for applications such as fixing carpet gripper and other components to concrete substrates. Spotnails also states that its ST-15/50 gas masonry nailer uses the same FST masonry nail family as the LT50.
This makes the LT50 / ST-15/50 platform a useful reference when evaluating compatible 15GA FST-style nails. Confirm actual strip and fastener geometry before substitution.
| Model | Length | General Selection Consideration | Packing |
|---|---|---|---|
| FST18 | 18 mm / 3/4" | Thin attached materials and shorter embedment requirements. | 50/strip, 1,500/box |
| FST25 | 25 mm / 1" | Trim, baseboards and thinner furring applications. | 50/strip, 1,500/box |
| FST35 | 35 mm / 1-3/8" | Medium-thickness attached materials requiring greater reach. | 50/strip, 1,500/box |
| FST50 | 50 mm / 2" | Thicker attached materials where the full 50 mm length is appropriate. | 50/strip, 1,500/box |
| Characteristic | FST50 | Typical 14GA ST T Nail |
|---|---|---|
| Fastener Class | 15GA hardened concrete finish nail | 14GA concrete T nail |
| Typical Shank | Approximately 1.8 mm | Approximately 2.1–2.2 mm |
| Head | Approximately 2.8 mm narrow-head class | Larger T-head profile |
| Typical Use | Finishing, trim, furring and selected light-gauge fastening | Heavier construction applications where a T-nail system is specified |
| Interchangeable | No | No |
The current KYA FST50 configuration contains 50 nails per strip and 1,500 nails per box.
When requesting bulk pricing, provide the required quantity, concrete nailer model, substrate type and application so the FST50 configuration can be checked against the intended fastening system.
| Selection Item | What to Confirm |
|---|---|
| Nailer | Must accept compatible hardened straight-strip 15GA nails at 50 mm length. |
| Length | 50 mm / 2". |
| Shank | Approximately 1.8 mm. |
| Head Width | Approximately 2.8 mm. |
| Collation | 0° straight glue-collated strip. |
| Attached Material | Confirm material type and thickness to determine whether 50 mm is appropriate. |
| Substrate | Confirm concrete, masonry or other substrate is suitable for direct hardened-nail fastening. |
| Connection Type | Confirm the application is suitable for a finish nail rather than a structural anchoring system. |
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MOQ: 50 boxes. One 50-piece sample box is offered free; the buyer pays freight. Confirm current MOQ, sample eligibility, shipping cost and dispatch lead time for your destination before ordering.
The full FST18–FST50 size range is listed as in stock. Availability can change; confirm current FST50 stock and lead time for the required quantity with KYA.
The product listing names KYA FST50, WOODPECKER FST50 and AIR LOCKER FST50 as compatible platforms. Confirm the exact nailer model, magazine fit and straight-strip dimensions before production use. FST50 is a 15GA hardened straight-strip fastener; gauge alone does not establish compatibility.
FST50 is listed for concrete rated above 5,000 PSI. Concrete mix, aggregate, tool power, embedment and attached material affect driving results. Test the actual substrate and confirm the application is suitable; FST nails are not a substitute for an engineered structural anchor.
The glue-collated strip is described as zero-jam with clean break-away. Feeding performance depends on the nailer and strip fit; use only a compatible FST tool.
A stainless-steel version is listed for coastal projects. Confirm the stainless grade and suitability for the actual marine or corrosive exposure before specifying it.
KYA states that its products meet or exceed ASTM standards and that test reports are available. Ask KYA for the applicable standard number and the FST50 test report for the requested product lot.
>Frequently Asked Questions
FST50 is a 15 gauge hardened concrete finish nail measuring 50 mm / 2 inches long with an approximately 1.8 mm shank and 2.8 mm head width.
FST identifies the hardened straight-strip concrete finish nail family, while 50 identifies the approximately 50 mm nail length.
Yes. Within the current KYA FST range shown on these product pages, FST50 is the 50 mm / 2" length option.
Not necessarily. FST50 provides greater length, but joint performance depends on substrate, embedment, attached material, nail geometry and installation conditions. Longer does not automatically mean stronger.
Choose FST50 when the attached component is thick enough to require additional nail length while still allowing suitable penetration into the receiving substrate. For thinner materials, a shorter FST nail may be easier to drive and more appropriate.
Yes, in suitable concrete using a compatible hardened concrete finish nailer. Test the actual substrate because concrete hardness and aggregate affect driving performance.
FST-style hardened nails are used in selected masonry applications, but brick and block vary considerably in density and brittleness. Perform test fastenings before repetitive installation.
Do not select FST50 solely from a concrete PSI value. Aggregate, substrate age, tool energy, nail length and installation conditions affect whether the nail can be driven correctly. Test the actual concrete first.
Yes, where the 50 mm length provides sufficient reach through the furring material and appropriate embedment into a suitable substrate.
It can be used for selected non-structural wood or plywood attachment where the nail dimensions and substrate are suitable. Structural sheathing or load-rated assemblies may require a specified anchor or other fastening system.
FST50 should not be treated as a universal structural anchor. Structural framing and truss connections can require fasteners or anchors with specified load capacities and installation requirements.
JITOOL lists FST50 at 50 mm within the FST fastener family used by its CS15/50 concrete nailer. When using third-party nails, confirm the actual strip and head dimensions before bulk use.
Tacwise specifies the EHS50V for Type 15G hardened finish nails up to 50 mm. Confirm complete fastener dimensions when substituting another manufacturer's nail.
The Spotnails LT50 is an FST-style concrete nailer platform with fastener lengths up to 50 mm. Confirm the exact strip geometry and nail dimensions before production use.
No. Conventional 15GA woodworking finish nailers can use angled fasteners with different head and strip geometry. FST50 requires a compatible hardened straight-strip concrete finish nailer.
No. FST50 uses approximately a 1.8 mm shank and narrow 2.8 mm head class. Typical 14GA concrete T nails use a thicker shank and a larger T-shaped head.
The current KYA FST50 configuration contains 50 nails per strip.
The current KYA FST50 configuration contains 1,500 nails per box.
Yes. The FST50 product described on this page uses a galvanized finish.
Provide the required quantity, concrete nailer model, attached material and thickness, concrete or masonry substrate, application and destination market.
Ask About FST50 Concrete Nails
KYA supplies FST50 2" 15GA hardened galvanized concrete finish nails for construction fastener distributors, interior contractors, trim installers, light-gauge installers and professional fastening users. Send your quantity, nailer model, attached material and substrate information to confirm the appropriate configuration.
