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DIN stands for ‘Deutsches Institut für Normung’ which means ‘German Institute of Standardization’. DIN develops norms and standards as a service to industry, to the state and to society as a whole. It is a registered non profit organization which has been based in Berlin since 1917. It consists of nearly 1,700 members who include individual companies, ...


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Here is a nice clear picture of the basic joint used in constructing things from their website. There is a washer on both sides. Their bill of materials calls for stainless bolts, stainless washers and stainless self-locking nuts: B O L T S & N U T S M6 SELFLOCKING NUTS, stainless (DIN985) - ca. 150 pieces (TWOSEATER: 200 pieces) M8 ...


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Yes - there should be a washer on each side on the outside - Aluminium is a soft metal and a bolt head/nut will sink into it over time, effectively loosening your bolt. I'd also expect there to be a small crush tube around the bolt, down inside the tube's square cross section. This would be a good idea even if they don't mention it on the plan - will stop ...


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Yes, it looks like they're just bolting one piece of box-section aluminum to another. I would use a washer on both sides. They're using steel screws and (presumably) steel washers. To avoid galvanic corrosion, I'd use plastic washers to isolate the aluminum from the steel. Also note that in the trike design, they're using a couple of pieces of plate at the ...


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