21 Degree Smooth Brite Duplex Strip Nails 3.3×72mm are high-quality plastic collated duplex framing nails specifically designed for temporary wood fastening applications. Featuring a unique double-head (duplex) design, these nails can be easily removed after use, making them ideal for concrete formwork, scaffolding, temporary bracing, and reusable wooden structures.
Manufactured from premium carbon steel with a bright (uncoated) finish, these duplex strip nails provide excellent driving performance while minimizing bending during installation. The smooth shank allows fast penetration into wood and makes nail removal easier than ring shank or screw shank nails.
These 21° plastic strip collated duplex nails are compatible with most popular 21-degree framing nailers designed for duplex nails. The 3.3mm diameter provides excellent strength, while the 72mm overall length ensures secure holding in heavy-duty temporary construction applications. Duplex nails are widely used because the exposed upper head allows easy extraction with a hammer after concrete curing or project completion.
The KYA Collated Duplex Nals are intended for temporary fastening of wood .for applications such as concrete formwork, bracing. orscaffolding asemblyThese duplex nalls have a large top nai head and an increased spacing between nalil heads to make it easier to pry the nails out of material.These Mlwaukeenalls feature a durable plastic colltion materialto stand up to the rigors of the jobsite.Availble in 2 lengths: 8D (2-1/4" Drivable Length/2-7/8 Total Length) & 16D (3" Drivable Length /3-5/8" Total Length).
Collation: 21 degree plastic strip
First Head Diameter: 6.05MM
Second Head Diameter: 6.0MM
Shank Type: Smooth shank [plain]
Shank Diameter: 3.3mm
Length to First head: 57mm
Overall Length including both heads: 72mm
Point: Diamond
Quantity: 2,000 pcs
| Specification | Details |
|---|---|
| Product Name | 21 Degree 3.3x72mm Duplex Head Plastic Strip Nail |
| Brand | KYA |
| Fastener Type | Duplex Strip Nails |
| Material | Carbon Steel |
| Collation Angle | 20°, 21°, 22° |
| Product Size | 3.3mm x 72mm |
| Diameter Range | 2.87mm / 0.113" to 4.10mm / 0.160" |
| Length Range | 50mm to 130mm |
| Point Type | Diamond Point |
| Head Type | Duplex Double Head |
| Shank Type | Smooth, Ring, Screw, Annular Thread |
| Finishing | Bright, Electro Galvanized (EG), Hot Dip Galvanized (HDG), DACR, MechGalv, Heat Treated, Stainless Steel (SS) |
| Coating | Yellow, Red, Blue |
| Compatible Tools | 20 to 22 degree plastic collation framing nailers |
| Main Applications | Concrete Formwork,Wall Forming,Foundation Forming,Bridge Construction,Temporary Wooden Structures,Scaffolding,Temporary,Fencing,Bracing |
Features a large top nail head for easier nail prying
Increased spacing between nail heads make nail prying easier
Plastic collation material for lasting jobsite durability
Large top nail head for easy gripping with a hammer or prybar
Increased spacing between nail heads to improve accessibility when pulling nails
Durable plastic collation material
Bright steel nails
| Shank Type | Performance | Recommended Use |
|---|---|---|
| Smooth Shank | Easy driving with standard holding power for general framing and construction. | General framing, carpentry and construction where maximum pullout resistance is not required. |
| Ring Shank | Rings grip wood fibers and provide stronger holding power than smooth shank nails. | Softer woods, sheathing, subflooring, pallets and applications requiring higher pullout resistance. |
| Screw Shank | Spins during driving to create a tight groove and improve holding strength. | Hardwoods and fastening applications where back-out resistance and enhanced hold are important. |
| Annular Thread Shank | Externally beveled rings improve grip and help prevent nail back-out. | Wood and sheet material fastening where strong withdrawal resistance is required. |
Concrete Formwork
Wall Forming
Foundation Forming
Bridge Construction
Temporary Wooden Structures
Scaffolding
Temporary Fencing
Bracing
Industrial Construction
Timber Assembly
Building Renovation
Construction Site Framework
Duplex strip nails are primarily intended for temporary fastening where quick removal is required after the job is complete, rather than permanent structural fastening.
| Finish | Description | Recommended Use |
|---|---|---|
| Bright Finish | Uncoated fastener surface with no added corrosion protection. | Interior framing where moisture exposure and corrosion risk are low. |
| Electro Galvanized (EG) | Thin zinc layer for limited corrosion protection. | Indoor or protected construction with light humidity exposure. |
| Hot Dip Galvanized (HDG) | Zinc-coated finish designed to resist corrosion and rust. | Exterior construction, treated lumber and weather-exposed applications where HDG is specified. |
| Stainless Steel (SS) | High corrosion resistance option, including 304 or 316 grades when required. | Exterior, coastal, high-humidity and corrosion-sensitive construction applications. |
| Selection Point | Available Options | Recommendation |
|---|---|---|
| Nailer Compatibility | 20°, 21° and 22° plastic collation framing nailers | Confirm nailer angle, collation type, head type, diameter and length before ordering. |
| Shank Type | Smooth, ring, screw, annular thread | Choose ring or screw shank when stronger holding power and pullout resistance are required. |
| Finish | Bright, EG, HDG, SS | Use HDG or stainless steel for exterior, treated lumber or corrosion-sensitive applications. |
| Head Type | Full round head, clipped head | Match head type to tool compatibility and local building requirements. |
| Application | Framing, sheathing, subflooring, truss building, pallets and crates | Select nail length, diameter and finish according to wood thickness, exposure level and project specification. |
They are designed for temporary fastening such as concrete forms, scaffolding, and reusable wooden structures.
The upper head remains exposed, allowing easy removal with a hammer after the work is finished.
Smooth shanks drive faster and are easier to remove than ring or screw shanks.
Bright finish is recommended for indoor or temporary applications. Galvanized versions are recommended for outdoor environments.
They fit most professional 21° plastic strip duplex nailers.
Yes. OEM branding and customized packaging are available.
Construction, concrete forming, infrastructure, bridge construction, and industrial projects.
Yes. KYA can discuss sample orders, shank type, finish, head type, length, diameter, collation angle, coating color, carton packing, bulk quantity and shipping schedule according to your project or distribution needs.
KYA Fasteners supplies plastic collated framing nails, 21 degree strip nails, coil nails, paper collated framing nails, roofing nails, pneumatic nailers, industrial staples, hog rings and fastening solutions for global construction and distributor customers. For framing, sheathing, subflooring and pallet assembly, KYA provides nail size selection, finish options, shank options and bulk supply support.
Contact KYA to get factory-direct pricing for 21 Degree 3.3x72mm Duplex Head Plastic Strip Nail , including shank type selection, finish confirmation, head type, nailer compatibility, samples, carton packing, bulk order quantity and delivery schedule.
