BH109 T20 Star TRS Drill 316SS 10-10×65 500




Fast Find: 109
Drive: T20 Star
Length: 65mm
Head: Truss
Gauge: 10
Material: 316 Stainless Steel
Point: Drill
Application: Decking Screw
Units Per Pack: 500

Blackhawk Speed Drive Decking Screws


Blackhawk 10 gauge, drill point, countersunk, 316 stainless steel, T20 star drive decking screw.

Decking screws come in a range of sizes and materials. Choosing the wrong screw can add unnecessary time and cost to your decking project. The Blackhawk Speed Drive decking screws have a range of features that will improve your decking experience.

316 Stainless Steel

The screw material is one of the most import factors when making your purchasing decision. Getting this wrong can have a huge impact on the strength and durability of your deck. Blackhawk Talon decking screws are available in 316 grade stainless steel. 316 Stainless steel:

  • Offers the greatest resistance from corrosion (rust).
  • Can be used in sever environmental conditions
  • Has an attractive silver finish
  • Can be used in close proximity to salt water bodies like the ocean and swimming pools

There are a number of environmental factors that can contribute to premature corrosion of fasteners. These factors can be, but are not limited to the following:

  • Preservative treated wood
  • Soils
  • Poor quality decking oil or decking paint

It is recommended that you discuss this with your builder or local council prior to commencing work.


The Blackhawk Speed Drive decking screws come in 50mm and 65mm lengths and are 10 gauge.

  • Gauge = the diameter of the threads (10 gauge = 4.8mm).
  • Length = the measurement from the top of the head to the tip of the point.

To determine the length of required screw, you will need to know the type of timber being used for both the decking and joists. When fixing into softwood joists, the screw should be 2.5 times the thickness of the decking board. When fixing into hardwood joists, the screw should be 2 times the thickness of the decking boards. Blackhawk Speed Drive decking screws are not recommended for metal joists.

Blackhawk Fasteners have made the task of choosing the right screw easier for you. Simply visit the CHOOSING THE RIGHT SCREW page to work out what length, gauge and even corrosion resistance level you require.

Drill Point

Drill point refers to the sharp, drill like point at the end of the screw. The Blackhawk Speed Drive decking screws have a patented point designed to reduce the need to pre-drill. The drill point:

  • Cuts into the timber creating its own pilot hole
  • Reduces the need to pre-drill your decking boards
  • Can pre-drill into a greater number of timber species, including most hardwoods

Different species of decking timber have different hardness levels. This will determine the need for pre-drilling. It is recommended that you always pre-drill the ends of the decking boards as they are prone to splitting.

T20 Star Drive

The T20 star-drive has a 6 point, star-shaped pattern. The star-drive shape:

  • Increases the surface area that the tool connects with
  • Allows more torque to be applied when driving the screw
  • Reduces the chances of “cam-out” and damage to the screw or tool

“Cam-out” is a term used when the tool that is driving the screw slips out.

BLACKHAWK provides 2 free 50mm T20 star drive bit that are suitable for use in impact drivers.

Truss Head

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

How many screws?

The Blackhawk drill point, trim head decking screws come in tubs of 500. The amount of screws that you will need depends on the size of your deck and the amount of joins you will have. Each join typically requires 4 screws. Most timber decking boards will come in random lengths. This makes it very difficult to pre-determine the exact amount of joins you will have, and therefore the amount of screws you will need.

Blackhawk has created a DECKING SCREW CALCULATOR to help you figure out how many screws you need. This will assist in reducing wastage and unnecessary added costs.