Decking Screws

Blackhawk Decking Screws are built tough for Australian tradies and the demanding conditions they work in. Developed by ITI, Australia’s largest timber and composite decking supplier with over 38 years of industry experience, these screws are the result of deep knowledge and real-world insight. Every detail—from thread design to coating—has been engineered to deliver strength, durability, and ease of use on-site. Backed by decades of decking expertise, Blackhawk Screws are the reliable choice for your next project.

Material

The screw material is one of the most important factors when making your purchasing decision. Getting this wrong can have a huge impact on the strength and durability of your project.

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An externally rated corrosion method, Class 3 Galvanised fasteners can be used in general outdoor applications.

  • Externally rated
  • Matte silver finish

Class 3 rated fasteners are not recommended for applications within 5km of breaking surf or in close proximity to swimming pools.

Blackhawk Protect is a high-grade, tri-layer coating process. These layers are joined together through a chemical process which results in a tightly bonded coating on the screw. Along with conforming to AS 3566.2 Class 3, Blackhawk Protect has advantages like:
  • Superior corrosion (rust) resistance over non coated/galvanised fasteners
  • The unique layering process reduces any damage to the coating if the screw is scratched
  • Less risk of premature corrosion due to reactions with other metal types Blackhawk Protect, like all class 3 equivalents, is not recommended for applications within 5km of breaking surf or in close proximity to swimming pools.
304 Stainless Steel is one of the most common materials used for fasteners. 304 Stainless Steel:
  • Protects the screw from corrosion in most external applications
  • Has an attractive silver finish
  • Is the material of choice for most decking professionals 304 Stainless Steel is not recommended for applications within 1km of breaking surf or in close proximity to swimming pools.
304 Extreme Stainless Steel has an improved formula when compared to standard 304 Stainless Steel. This results in a higher level of corrosion resistance. 304 Extreme Stainless Steel:
  • Protects the screw from corrosion in most external applications
  • Has an attractive silver finish
  • Has greater corrosion protection than standard 304 Stainless Steel 304 Extreme Stainless Steel is not recommended for applications within 1km of breaking surf or in close proximity to swimming pools.
316 Stainless Steel is a marine grade of Stainless Steel. 316 Stainless Steel:
  • Offers the greatest resistance from corrosion
  • Can be used in severe environmental conditions
  • Has an attractive silver finish
  • Can be used in close proximity to salt water bodies like the ocean and swimming pools

Drive Type

The drive type will determine what driver bit you will need and how much grip it has with the screw.

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T25 STAR DRIVE The T25 star-drive has a 6 point, star-shaped pattern with a diameter of 4mm.
  • Increases the surface area that the driver bit connects with
  • Allows more torque to be applied when driving the screw
  • Reduces the chances of cam-out* and damage to the screw or driver bit
T20 STAR DRIVE The T20 star-drive has a 6 point, star-shaped pattern with a diameter of 3.7mm.
  • Increases the surface area that the driver bit connects with
  • Allows more torque to be applied when driving the screw
  • Reduces the chances of cam-out* and damage to the screw or driver bit

5MM INTERNAL HEX
The internal hex drive is a large drive type that is capable of high torque applications. The large amount of surface area reduces the risk of cam-out* . The “5mm” refers to the size of the driver bit.

#2 SQUARE DRIVE The #2 square drive is shaped as its name suggests, like a square. The “#2” refers to the size of the square. #2 = 2.82mm x 2.82mm.
  • Helps to centre the screw
  • Helps engage the screw with the driver, reducing the need for the user to hold the screw in place
  • Reduces the chances of cam-out* and damage to the screw or driver bit

Point Type

The point of the screw will determine what it is capable of screwing through. The screw point that you use will be dependent on the material you are using for your project and if you are pre-drilling. Different species of timber have different hardness levels. This will determine the need for pre-drilling. It is best practice to test the screws on an off-cut to ensure the desired result is achieved. It is recommended that you always pre-drill the ends of decking boards as they are prone to splitting.

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TYPE 17 POINT Type 17 refers to the long, cut section at the point of the screw.
  • Helps to remove debris when being driven through timber
  • Reduces the need to pre-drill into softwood timber
DRILL POINT Drill point refers to the sharp, drill like point at the end of the screw.
  • Cuts into the timber or metal creating its own pilot hole
  • The timber drill points reduce the need to pre-drill softwood and hardwood timber
  • The metal drill point eliminates the need to pre-drill into light gauge metal
WINGED POINT – METAL USE Winged point refers to the sharp, drill like point at the end of the screw. The winged point also incorporates two wings that protrude out from the screw and look like ears. The wings break away once they come in contact with metal. This allows the thread of the screw to make an opposite thread in the metal. It then tightens the timber to the metal.
  • Cuts into the timber creating its own pilot hole, allowing the screw to spin more freely. This makes it easier for the screw to drive through metal
  • Eliminates the need to pre-drill metal
  • Drill point screws can pre-drill into a greater number of timber species, including most hardwoods

Head Type

Choosing the right head type can have a big impact on the overall finish of the screw n your deck, some heads are better suited to certain wood types and careful consideration should be made to ensure you get the right head for your screw.

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BUGLE HEAD
The bugle-shaped head reduces the amount of damage to the material when countersinking.

COUNTERSUNK HEAD WITH RIBS
A countersunk head helps finish the screw flush with the material being fastened. The countersunk head has integrated ribs on the underside. This helps to remove excess timber, resulting in a smoother, cleaner finish.

TRUSS HEAD
A truss head has a smaller profile than a countersunk head and cuts through the decking surface. Truss head screws have integrated ribs on the underside of the head. This helps to remove excess timber, resulting in smoother, cleaner finish.

Blackhawk Screw Calculators

Decking screws come in a range of sizes and materials. It is important that you choose the right screw for your project. Blackhawk have designed a calculator to help choose the right screw for you.

Click here

Product Range

View Range
X1 SERIES

LARGE HEAD | GENERAL PURPOSE

Fast Find Length Gauge Drive Point Material Box QTY
BH101 50 12 T25 Star Type 17 304 Extreme Stainless Steel 6 x 250
BH102 65 12 T25 Star Type 17 304 Extreme Stainless Steel 6 x 250

Power-10 Series

View Range

STAR DRIVE | GENERAL PURPOSE

Fast FindLengthGaugeDrivePointMaterialBox QTY
BH1035010T25 StarType 17304 Extreme Stainless Steel500
BH1045010T25 StarType 17304 Extreme Stainless Steel1,000
BH1056510T25 StarType 17304 Extreme Stainless Steel500

Speed Drive Series

View Range

SELF-DRILLING | SELF-COUNTERSINKING

Fast Find Length Gauge Drive Point Material Box QTY
BH106 50 10 T20 Star Drill 304 Extreme Stainless Steel 500
BH107 65 10 T20 Star Drill 304 Extreme Stainless Steel 500
BH108 50 10 T20 Star Drill 316 Stainless Steel 500
BH109 65 10 T20 Star Drill 316 Stainless Steel 500
BH136 50 10 T20 Star Drill Blackhawk Protect 500
BH137 65 10 T20 Star Drill Blackhawk Protect 500

Speed Drive Series

View Range

SELF-DRILLING | SELF-COUNTERSINKING

Fast FindLengthGaugeDrivePointMaterialBox QTY
BH1385010T20Star DrillBlackhawk Protect500
BH1396510T20Star DrillBlackhawk Protect500
BH1405010T20Star Drill304 Extreme Stainless Steel500
BH1416510T20Star Drill304 Extreme Stainless Steel500

Talon Series

View Range

SQUARE DRIVE | GENERAL PURPOSE

Fast Find Length Gauge Drive Point Material Box QTY
BH111 40 10 #2 Square Type 17 Blackhawk Protect 6 x 250
BH112 50 10 #2 Square Type 17 Blackhawk Protect 6 x 100
BH113 50 10 #2 Square Type 17 Blackhawk Protect 6 x 250
BH114 50 10 #2 Square Type 17 Blackhawk Protect 500
BH115 50 10 #2 Square Type 17 Blackhawk Protect 1,000
BH116 65 10 #2 Square Type 17 Blackhawk Protect 6 x 100
BH117 65 10 #2 Square Type 17 Blackhawk Protect 6 x 250
BH118 65 10 #2 Square Type 17 Blackhawk Protect 500
BH119 40 10 #2 Square Type 17 304 Extreme Stainless Steel 6 x 250
BH120 50 10 #2 Square Type 17 304 Extreme Stainless Steel 6 x 250
BH121 50 10 #2 Square Type 17 304 Extreme Stainless Steel 500
BH122 50 10 #2 Square Type 17 304 Extreme Stainless Steel 1,000
BH123 65 10 #2 Square Type 17 304 Extreme Stainless Steel 100
BH124 65 10 #2 Square Type 17 304 Extreme Stainless Steel 6 x 250
BH125 50 10 #2 Square Type 17 316 Stainless Steel 6 x 250
BH126 65 10 #2 Square Type 17 316 Stainless Steel 6 x 250

Metal Drive Series

View Range

FIXING TIMBER TO METAL

Fast FindLengthGaugeDrivePointMaterialBox QTY
BH1424010#2 SquareWingBlackhawk Protect6 x 250

Power-8 Series

View Range

FIXING TIMBER TO METAL

Fast Find Length Gauge Drive Point Material Box QTY
BH127 50 8 #2 Square Type 17 Blackhawk Protect 500
BH128 65 8 #2 Square Type 17 Blackhawk Protect 6 x 250
BH129 50 8 #2 Square Type 17 304 Extreme Stainless Steel 500
BH130 50 8 #2 Square Type 17 304 Extreme Stainless Steel 1,000
BH131 65 8 #2 Square Type 17 304 Extreme Stainless Steel 6 x 250

Fusion Series

View Range

HARDWOOD TO HARDWOOD

Fast FindLengthGaugeDrivePointMaterialBox QTY
BH1325012T20 StarDrill304 Extreme Stainless Steel500
BH1336512T20 StarDrill304 Extreme Stainless Steel500
BH1345012T20 StarDrill316 Stainless Steel500
BH1356512T20 StarDrill316 Stainless Steel500

Fasteners designed for tradies and purpose built to withstand harsh Australian conditions.

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