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Product Information

Hex Bolt has a hexagon head, part thread and part shank and is used to fasten metal to metal, metal to timber.
If thread length is critical there is a cross over where a hex bolt could be fully threaded. This is due to a gradual change in the fastener industry due to wholesalers wanting to reduce their stock holdings, now they only carry the shorter lengths as fully threaded. Therefore, if thread length is critical, always check our specifications or contact us prior to ordering.
Used to fasten objects together by inserting the bolt from the one end and securing it with either a nut on the other end or into a taped hole. A nut and bolt combination compresses everything together
To tighten the nut requires a socket and wrench or a spanner, If, while tightening the nut, the bolt turns with it, a second spanner or wrench is required to hold-on to the bolt while the nut is tightened
Zinc Plated is the most common fastener of plating due to its the low cost and shinny bright silver finish. A thin layer of zinc is applied by either electroplating or mechanically. It is intended to be used internally. Whilst some people use it externally it isnt recommended if corrosion is a concern. If you want a fastener that will withstand the outdoor elements choose from our Stainless steel range
Metric fastenings are referred to as classes, imperial fastenings are referred to as grades. Both have marking systems that make it possible to determine grade and class. An example is a 1/2" 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
Photos are of the product but may not be the drive size or length, always refer to the title and description prior to ordering
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
Note: 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
Manufactured to AS1110.1
If you are looking for another type, diameter, length, width, material or pack size use the store search box on our store page
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Price Includes GST, Tax Invoice And Free Delivery Anywhere In Australia

Product	Hex Bolt
Head Type	Hex Head
Bolt Size	M20 (20mm)
Thread Pitch	2.50mm
Thread Type	Coarse
Length - from under the head	120mm
Thread Length APPROX	46mm
Bolt Diameter APPROX	19.67 ~ 20.00mm
Across Flats APPROX	29.67 ~ 30.00mm
Across Centres APPROX	33.53 ~ 34.60mm
Head Height APPROX	12.28 ~ 12.72mm
Material	High Tensile Carbon Steel
Class	8.8
Brand - Our Discretion	Hobsons / Bremick / Brighton Best
Pack Quantity	2