Can a zinc plated socket head cap screws be used?

Jaime previously purchased a 10.9 class hexagon socket cap head screw from other screw manufacturers for surface treatment of blue zinc plated. However, when the goods arrived at them, they were tested and found that the screws were hydrogen embrittled. The manufacturer explained to Jaime that because of the blue zinc treatment, there were internal changes that they did not know, resulting in hydrogen embrittlement of the screws. This time, Jaime needs to purchase a 12.9 class zinc plated socket head cap screws, worrying about hydrogen embrittlement, and ask if we can do it?

Because I don’t know which type of zinc is galvanized in the 12.9 grade zinc plated socket head cap screws, I asked Jaime which kind, and gave Jaime the galvanized surface treatment we can do. Jaime said it was made of bismuth zinc. Surface treatment, and asked if our surface treatment will have an effect on the screw, such as hydrogen embrittlement.

We told Jaime that it wouldn’t be done at level 12.9 zinc plated socket head cap screws. Jaime said he was relieved because he was worried that all zinc would cause hydrogen embrittlement on high-strength screws. After confirming our production, Jaime placed an order for us.

If you want to customize  zinc plated socket head cap screws, please send an email: annie.li@szsst88.com