Bolt fitting.
http://photos.imageevent.com/badgerd...0boltheads.pdf
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Bolt fitting.
http://photos.imageevent.com/badgerd...0boltheads.pdf
I don't know where this term originates (Possibly a US term) but it's where someone has removed an original number off an item and then remarked a new number to match the master part. So a used replacement bolt has the original number ground off and someone just stamps or electro pencils a new number to match the body. Obviously this was done in service to match replacement parts but more often than not in this day and age, it's done (Sometimes well) to deceive people into paying more for something!
You can get new bolts that are un-numbered and get it numbered correctly if that is annoying you a lot. However Im not sure if they will have a "S" on them, so it may not be "perfect".