The advice appears to be:
“Leaving Exposed Surfaces Open to Contamination and Corrosion
The exposed part of the fastener, for example, the top part of a screw, can often be exposed to various contaminants that could cause corrosion. For instance, metal filings may settle on it, causing it to rust gradually. This also leads to internal damage and decay of the material. Try to keep the exposed parts covered at times when such contaminants might be present, and promptly clean any likely culprits away. Other tips to reduce contamination include:
Ensure the screw tips are made from Chrome Vanadium steel
Use hardened-chrome plated Allen keys
Use high-quality stainless steel or hardened-chrome hammers”
The advice appears to be:
“Leaving Exposed Surfaces Open to Contamination and Corrosion
The exposed part of the fastener, for example, the top part of a screw, can often be exposed to various contaminants that could cause corrosion. For instance, metal filings may settle on it, causing it to rust gradually. This also leads to internal damage and decay of the material. Try to keep the exposed parts covered at times when such contaminants might be present, and promptly clean any likely culprits away. Other tips to reduce contamination include:
Ensure the screw tips are made from Chrome Vanadium steel
Use hardened-chrome plated Allen keys
Use high-quality stainless steel or hardened-chrome hammers”