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From: ------
From: ------
I would suggest Tin-Lead Electro - Plating per. MIL-P-81728 of the bolt. I believe that the plating composition is 50-70% tin, 1% garbage, the remainder lead. Plating thickness is .3 to .5 mils, or spec. what you want different. The top end temperature is 121 C (250 F).