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Made of aluminum, these spacers are lightweight and mildly corrosion resistant.
18-8 stainless steel spacers have good corrosion resistance.
The zinc plating provides some corrosion resistance.
Brass makes these spacers electrically conductive and the zinc-plated finish adds corrosion resistance.
These spacers have excellent wear and abrasion resistance. Exposure to moisture may cause them to expand.
Also known as captive spacers, the splines on these bite into a panel for a permanent hold.