M8 (8mm) Galvanised Hex Coach Screws Low Tensile Class 4.6 AS 1393
As low as
$5.00
Regular Price
$5.50
In stock
SKU
578G_configurable
- Hex Coach Screws are a heavy duty screw used to fix wood to wood or metal to wood. They are designed with a hexagonal head and, therefore, require a wrench or socket spanner to be tightened or unscrewed. The screws have broad heads, preventing them from pulling into the wood and enabling them to compress the substrates together, making them a good choice for joints that see heavy use. Coach screws can also be used in conjunction with wall plugs for anchoring heavy objects, such as TV arm or satellite dishes, into masonry or concrete. It is, however, important to note that Coach Screws should never be over tightened as this could cause the screw to break off
- Thread Lengths * = Measurements provided are the MIN thread length and are provided to be used as a GUIDE only. They do vary between brands and batches and your delivery may be shipped with 2 thread lengths. If thread length is critical, please contact us prior to ordering and we will check the stock
- Pilot holes = All Coach Screws require a pilot hole before they're screwed into place, no matter what type of wood you are working with. Drill the pilot hole 2mm smaller than the size coach screw being used.
- Material / Coating: Galvanised is a dull greyish colour and can be a little rough in appearance and is mainly used outdoors because of its superior corrosion resistance and proven longevity. Also known as HDG, it is one of the best coatings for protection against rust. Galvanised fasteners have been used across many industries in Australia for over 150 years, roofing, steel buildings, trailers, bridges, fencing, power poles, marina’s, are just a few examples. Recently we have seen a lot of new coatings developed, terms like class 3, class 4, B8, climseal, mechanical galvanised and ruspert are all variations of the original galvanising
- Grade v Class Difference: Imperial fastenings are referred to as grades, and metric fastenings are referred to as classes. Both have marking systems that make it possible to determine grade and class. An example is a ½” UNC bolt with 5 lines on the head is grade 8 and 3 lines is grade 5, both are regarded as high tensile. Metric bolts are slightly different, if it has 4.6 then it is mild steel and 8.8 is high tensile. The markings on a stainless fastener indicate the grade of material and strength, e.g. material G304 grade will have one of the following markings: A2-70, G304, A2, 304 and G316 grade stainless will have one of the following: A4-70, G316, A4, 316
- 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
- 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 thread length, visible stamped markings, appearance or actual finish
- Photos: are of the product but may not be the actual diameter or length you may require, always refer to the size in the description and additional specifications data provided prior to ordering
- 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
- Updating our site: If you see any problems with any of our specifications or you require additional information please contact us
- Buy with confidence: ⇒ 13+ years experience selling online, > 24,000 stock lines, > 130 million pieces ex stock in Brisbane QLD
- Prices: Include GST, a Tax Invoice and Free Standard Delivery anywhere in Australia
| System of Measurement | Metric |
|---|---|
| Product | Hex Coach Screw |
| Head Type | Hex Head |
| Size | M8 (8mm) |
| Thread Pitch | 3.00mm |
| Thread Direction | Right Hand |
| Thread Type | Metric - Coarse |
| Corrosion Protection Level | Excellent |
| Class / Grade | Low Tensile Class 4.6 |
| Material | Carbon Steel |
| Finish | Galvanised |
| Length (l) | Select from the dropdown |
| Thread Length (t) | Thread length will be at least 60% or more for the length of screw* see below for more info |
| Product Diameter (d) | 7.42 - 8.58mm |
| Across Flats (af) | 12.57 - 13.00mm |
| Across Corners (ac) | 14.20 - 15.00mm |
| Head Height (h) | 5.13 - 5.88mm |
| Spanner Size | 13mm |
| Drive Type | Hex |
| Closest size in imperial | 5/16" |
| Standard Made To | AS1393 |
| Brand | Hobson Engineering |
| Alternative Brands | Bremick Fasteners | Brighton Best |
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