5/16" x 24 TPI UNF Fine Zinc Hex Bolts High Tensile Grade 8 AS 2465 (2023)

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• Hex Bolts have a hexagon head, part thread and part shank and is used to fasten material 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. 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
• Material / Coating: 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
• 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
• Thread Pitch (Imperial):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, you simply count the number of threads contained within an inch of length. If the screw is less than an inch count upto ½” and x by 2
• Fastener length: is generally measured from the point where thesurface of the materialwill be when the fastener is installed to theend 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
• A guide to determining the approx. thread length, please note this is only a guide: upto and including 5" = 2 x diameter + 1/4", over 5" up to and including 8" = 2 x diameter + 1/2", over 8" = 2 x diameter + 1"
• 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, height, width, 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: ⇒ 10+ years experience selling online, > 19,000 stock lines, > 80 million pieces ex stock in Brisbane QLD
• Prices: Include GST, a Tax Invoice and Free Standard Delivery anywhere in Australia

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Thread Pitch Chart.pdf Imperial vs Metric Strength Chart.pdf Bolts Markings.pdf Specs - Hex Bolt Imperial UNF Grade 8 Zinc Silver.pdf