Summary for galvanize threaded holes Discussion
Keep galvanize out of threaded holes is the core advice in this short thread, which points readers to a galvanizing reference rather than a full discussion. The page is essentially a heading for a technical note about avoiding zinc buildup in threads during hot-dip galvanizing. No detailed Q&A appears in the excerpt, but the implied practical concern is clear: threaded holes should be protected or cleaned so the coating does not interfere with assembly. The source also promotes engineering books on galvanizing, including Dietrich Horstmann’s Faults in Hot-Dip Galvanizing, suggesting the topic is part of a broader effort to prevent common coating defects. Because the excerpt contains no named respondent or detailed answer, the safest takeaway is the general process control point: plan ahead so galvanizing does not clog threads.
SUGGESTED GALVANIZING BOOKS
for Engineers, Shops, Specifiers

“Hot Dip Galvanizing of Steel Structures” by Kuklik & Kudlacek (2016)
avail from
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AbeBooks, or
Amazon

“Handbook of Hot Dip Galvanization” by Maass & Peissker (2011)
avail from
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AbeBooks, or
Amazon

“Galvanized Steel Reinforcement in Concrete” by Stephen Yeomans (2004)
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AbeBooks, or
Amazon

“Hot Dip Galvanizing — A Guide to Process Selection & Galvanizing Practice” by M. J. Hornsby (1995)
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eBay,
AbeBooks, or
Amazon
“Faults in Hot-Dip Galvanizing” by Dietrich Horstmann (in English, French & German)
avail from
Amazon
“User’s Guide to Hot Dip Galvanizing for Corrosion Protection in Atmospheric Service” by NACE (1997 only rarely avail.)
avail from
AbeBooks, or
Amazon
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Q. Need a means of excluding galvanization from being plated into the threaded holes on parts we send out for plating. The plater we are using tried to put 5/8″ bolts into the holes. They broke off when removal was attempted. Does anyone offer a plug of some sort that will seal these holes, and withstand the temps needed for hot dip galvanizing? Thanks.
Andrew R Moss
OEM Manufacturer – Beatrice, Nebraska, USA
2005
A. There is a very simple solution. Apply never-seize to the bolts before putting them in the holes prior to sending them to the galvanizer. I’d done hundreds of holes this way. You can even save the bolts for the next job. Good luck!
David Jaye
Houston, Texas
2005
