12g (5.50mm) Galvanised Countersunk Square (SQ3) Series 500 Fine Metal Self Drilling Screws
$5.00
In stock
SKU
09C12500C4_configurable
- Series 500 Countersunk Head Self Drilling Screws have an extended drill point for drilling through steel up to 12mm by creating a hole. Commonly used for cladding and metal roofing, carports, sheds, garages and general construction when you need to drill into thicker than normal steel and require a counterunk flush finish.
- Installation: Install using a SQ3 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: Galvanised coated fasteners have been used for roofing, cladding, steel buildings, trailers, bridges, fencing, power poles, outdoor furniture, house framing, fencing and marina’s for over 150 years. Since galvanising was first introduced, we have seen a lot of new terms like Class 3, Class 4, B8, Climaseal 3, Climaseal 4, Climaseal 5, Armour Ceramic Coating, Mechanical Galvanised and Ruspert. They are all variations of the original galvanise. All metal self drilling screws from Bolt and Nut Australia are guaranteed to comply to a minimum of Class 3 and extend to Class 4 and the ultimate of protection B8. Please refer to our technical pages for more information or contact us for advice on choosing the right fastener
- 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: these 12g-24 series 500 countersunk screws have a head height if 5.50mm head height and a drill point of approx. 17.00mm. This equals 22mm approx, so, on a 50mm long screw you are going to be left with approx. 28mm 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:Extended (no.5) series 500 point is designed for drilling through steel up to 12mm thick
- How to measure the length of a Metal Screw: Fastener length is generally measured from the point where the surface of the material will be when the fastener is installed to the end of the fastener. Thus, fasteners with heads that sit above the surface are measured from under the head to the end of the fastener, while fasteners that sit flush with the surface are measured from the top of the head to the end of the fastener
- 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
- Buy with confidence: ⇒ 10+ years experience selling online, > 19,000 stock lines, > 80 million pieces ex stock in Brisbane QLD
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| System of Measurement | Screw Gauge |
|---|---|
| Product | Series 500 Self Drilling Metal Screw |
| Head Type | Countersunk Head |
| Size | 12g (5.50mm) |
| Thread Pitch | 24 TPI |
| Thread Direction | Right Hand |
| Thread Type | Fine |
| Corrosion Protection Level | Excellent |
| Class / Grade | Class 3 / 4 / B8® Cat 5 |
| Material | Hardened Steel |
| Finish | Galvanised |
| Product Diameter (d) | 5.30 - 5.40mm |
| Head Diameter (a) | 10.50 - 10.80mm |
| Screw Length (l) | Overall length measurement includes head, thread and drill point |
| Head Height (h) | 3.80mm |
| Drill Point Length (p) | 17mm |
| Min to Max Steel Thickness | 3.00 - 12.00mm |
| Drive Size | SQ3 |
| Screw Point | Drill Point |
| Drive Type | Square |
| Recommended Drill Speed | Under 3000 rpm |
| Closest size in mm | 5.50mm |
| Closest size in imperial | 0.22" |
| Standard Made To | AS3566 |
| Brand | Tower |
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