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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.
The anodized coating on these lightweight spacers provides increased abrasion resistance over uncoated aluminum.
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.
Polypropylene spacers have a hard surface and resist many chemicals and solvents.
Also known as shoulder washers.
As you tighten your screw, the rolled collar compresses under the head to create an insulating barrier between a screw shank and a mating surface.