-S4 Finish

Arcieri

Arcieri

Senior Member
Working on fasteners for a fine point car.

Confused a little by the S4 finish designation for a number of bolts, nuts, etc.
The 1932 Ford price list defines S4 as raven finish and black paint.

So for example did Ford specify a lock washer that called for an S4 finish to first be plated with raven finish and then the whole thing painted black? Or did Ford specify the washer to be plated raven and then paint only the edges black??

Can not imagine Henry spending that much money to double finish any fastener.

Same question for the bolts.

Thanks,
Ray
 
Actually, the S4 designation was used quite a bit in production, ...and the S3 was the one that the bolt head was only painted. I think the reason for S4 has to do with most of those areas are in the eye of the onlooker (usually used on lamps, spare tire carriers, etc. if I recall correctly) and when the threads of the fastener are left bare, over time the unfinished threads will start to streak rust stains out onto the finish area, so the easiest way was to seal the entire fastener with the Ravening process.
 
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