A brass nut is silver soldered to a stainless steel threaded bolt with SSQ-6 Silver Solder Paste from https://MuggyWeld.com
The parts have been pre-cleaned prior to adding the solder to the cold metal. Mike uses a propane torch to create a bond that is as strong as a MIG weld.
Please read all instructions prior to use at: https://www.muggyweld.com/wp-content/uploads/2017/04/SSQ-6-instructions.pdf
For more videos and information, or to order, visit https://MuggyWeld.com
International customers, please order at: https://www.ebay.com/usr/muggyweld
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Please visit https://www.aws.org/technical/facts/ prior to using Muggy Weld products, and adhere to all AWS welding safety guidelines. Further product safety information is available at https://muggyweld.com/safety-guidelines.
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MSDS sheets available with purchase from MuggyWeld.com, upon request.