10g (4.80mm) G304 Stainless Countersunk Wing Square (SQ2) Bi-Coarse Metal Self Drilling Decking Screws

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SQ2 x 50mm Hobson IMPAX Square Driver Bit ***Bundle Buy***

$2.00

SQ2 x 50mm Alpha ThunderMAX Square Driver Bit ***Bundle Buy***

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Handipak of 10 - SQ2 x 50mm Alpha ThunderMAX Square Driver Bit ***Bundle Buy***

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SQ2 x 100mm Hobson IMPAX Square Driver Bit ***Bundle Buy***

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10g STD Head Hobson EZ-Bit Decking Tool ***Bundle Buy***

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Technical Specifications

Specs - Countersunk Rib Square Metal Self Drilling Screw Wing Stainless G304.pdf Hobson Screw Guide.pdf Hobson Bi-Metal.pdf

System of Measurement Screw Gauge
Product Self Drilling Metal Screw with Wings
Head Type Countersunk Head Ribbed
Nibbed Between 4 - 8 Ribs depending on brand
Size 10g (4.80mm)
Thread Pitch 16 TPI
Thread Coarse
Thread Direction Right Hand
Corrosion Protection Level Excellent
Internal or External External
Class Grade A2-70 G304
Material Stainless Steel / Hardened Steel
Finish Silver Rusperts 1000HRS
Product Diameter (d) 4.65 - 4.80mm
Head Diameter (a) 8.80 - 9.20mm
Screw Length (l) Overall length measurement includes head, thread and drill point
Head Height (h) 3.98mm
Drill Point Length (p) 11.70 - 13.80mm
Min to Max Steel Thickness 1.20 - 3.00mm
Maximum Timber Thickness 32mm
Drive Size (as) SQ2
Screw Point Drill Point
Drive Type Square
Recommended Drill Speed Under 3000 rpm
Material Application Drill Point c/w Wings
Standard Made To AS3566
Brand Hobson Engineering

Dimensional data is a guide only. Tolerance differences exist between brands and batches

Description

Countersunk Head Self Drilling Screws has an aggressive self embedding head which means this screw can be quickly applied without the need to pre-drill or countersink, saving time during application. The two protruding wings create clearance through the timber and break off during entry into the steel.
Installation: Easy to install using a SQ2 impact rated square driver bit in a impact power tool, a large range of bits are available in the drilling driving tools section of our website.
Material / Coating: A Bi-Metallic screw, as the name suggests, is a screw comprised of two metal types. The point is manufactured from high grade carbon steel that is heat treated to give it the ability to self-drill, the same as any other standard metal SDS on the Australian market. The head section is however manufactured from a corrosion resistant stainless steel (either 304 or 316). The two metals are "fused togther" to form a screw that offers excellent self-drilling properties, combined with exceptional corrosion properties. The screws are then coated in a zinc protective layer that makes them visually difficult to distinguis from a zinc plated standard SDS
Why do we need them?: Roofing & cladding applications: Areas of extreme corrosion where either aluminium or stainless steel roof sheeting is used requires a special screw that exhibits superb corrosion resistance as well as the ability to self-drill
Can Stainless corrode?: Stainless steel is corrosion-resistant but not corrosion-proof and corrosion can occur if the material is installed or handled incorrectly. The use of tools and drills made from conventional steel during the installation of stainless steel fasteners may also lead to problems. Even the hardest of tools can produce debris that leaves minute steel particles on the stainless steel fastener surfaces or in pre-drilled holes. It is these particles that often rust when exposed to moisture or oxygen and can result in a stained or tarnished finish to the stainless steel material
What does TPI stand for?: TPI stands for “threads per inch” which literally means the number of threads within each inch on a screw, a bolt, or a fastener. To determine the TPI of a screw, count the number of threads contained within an inch of length on the fastener. If the screw is less than an inch count ½” of an inch and multiply by 2
Length of Thread: Always choose a self driller with enough threads to fully engage in the base metal. For attachments to 1/4" base steel, a self-drilling screw should have at least 1/4" of threads. It is helpful, but not critical, that the threads also engage in the material being fastened. The head of the fastener provides the bearing force for the material being fastened, while the threads provide the clamping force in the base material
To determine Thread Length: Before buying countersunk screws, it is recommended to work out the overall length you need. Because the overall length includes head height and drill point length you have to add the 2 together then minus that from the overall length to get the approx thread length. For example: a 10g-16 x 35mm countersunk self drilling screw has a 4mm head height and a drill point of approx. 12.50mm. This equals 16.50mm approx, so, on a 35mm long screw you are going to be left with approx. 18.50mm of thread. This detail is often overlooked and it is only when the screws turn up you find they are too short and your project is delayed. All this data along with other specifications is on the specifications table and as always, measurements are approx and do vary between batches and suppliers, if critical always check with us prior
Drill Point Style: A twist drill style hardened point for fast driving into light gauge sheeting, cladding panels, sections and assemblies. The length of the drilling flutes determine the amount of drilling swaft that can be expelled and therefore the depth of metal can be drilled
Need a Driver Bit?: A large range of suitable driver bits are available in the "Driving" section of our website
Measurements: Every effort has been made to ensure all measurements on our site are accurate and to the relevant standard, they should only be used as a guide. If you see a problem with our specifications please contact us
Dimensions: Our stock is sourced from various suppliers, therefore differences may exist between batches such as height, width, visible stamped markings, appearance or actual finish
Photos: are of the product but may not be the actual diameter, length, thread length, colour you require, always refer to the size in the description and additional specifications data provided prior to ordering
Updating our site: If you see any problems with any of our specifications or you require additional information please contact us
Disclaimer: Technical data and specifications were researched and compiled from numerous industry sources for the sole purpose of providing basic information. All material is advisory only and its use by anyone is entirely voluntary. Reliance on it for any purpose by anyone is at the sole risk of that person, and Bolt and Nut Australia is not responsible for any loss, claim or damages arising therefrom. In developing this information, Bolt and Nut Australia has made a determined effort to present it accurately
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Delivery

Orders UNDER $30

Weigh less than 500grams

Exceptions: Tools, Kits, Bulky items = Sent as a parcel with tracking

Small orders that fit into the slot of your Letterbox are sent:

FREE with Aust Post Letter delivery with NO TRACKING and delivery between 4-12 business days

Select a Quicker delivery service

$7.00 Parcel Delivery 2-7 business days
From $10.00 Express Delivery 1-4 business days
From $12.00 StarTrack PREMIUM Express Delivery 1-3 business days

Click & Collect - Warehouse pickup

Unit 9, 93 Rivergate Place, Murarrie, QLD

Place your order online and we will have it ready within 2 hours. Call if required sooner
Pickup times between 8am - 5pm, Monday - Friday

Orders OVER $30

Weigh more than 500grams

Included is orders under $30 but weigh more than 500grams or wont fit in the slot of your letterbox

Including Large and Bulky heavy orders are sent:

FREE as a Parcel Delivery WITH TRACKING and delivery between 2-7 business days

Select an Express delivery service

From $10.00 Express Delivery 1-4 business days
From $12.00 StarTrack PREMIUM Express Delivery 1-3 business days

Click & Collect - Warehouse pickup

Unit 9, 93 Rivergate Place, Murarrie, QLD

Place your order online and we will have it ready within 2 hours. Call if required sooner
Pickup times between 8am - 5pm, Monday - Friday

All delivery dates are estimated and depend on stock availability, delivery location, service chosen, size of order, time of year, when order was placed e.g long weekends or sale periods.

Further delivery information can be found on our Delivery page on this website

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