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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Silver plating on female threads

I have a question regarding the silver plating done on some of the 316 female nut threads.. It is a standard that silver plating must be done on female threads used for critical applications and high temperatures. It is also known to aid in the prevention of galling. I would appreciate if anyone clarified as to how exactly Silver plating helps the above stated concerns, which are "high temperature application" and "galling prevention".

Thanks in advance

Karthik Chandrashekar
buyer - Bangalore, Karnataka, India
February 12, 2009

February 12, 2009

Hi, Karthik. I'm not familiar with silver being required for "high temperature", but I do know of it as an anti-galling agent. 316 stainless is a great material for fasteners, but 316 threaded onto 316 will definitely gall against each other -- this is sort of like a "cold welding" phenomena. Silver gives good lubricity and prevents the galling.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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