Steel is the most common material for spring washers due to its ease of process and its high tensile strength. Chrome vandium alloy is a higher quality steel with a good through-hardening capability; it is used to make very thick spring washers.
How to Prevent Swimmerâs Itch. Thereâs no cure-all to eliminate swimmerâs itch. The negative symptoms are, ironically, a problem of our own immune systemâs making, and short of abstaining from swimming altogether, thereâs a risk of getting swimmerâs itch in a Northern Michigan lake.
To protect your family and others while swimming the CDC recommends the following tips: 1  Don't swim or let your kids swim if sick with diarrhea. 2  If diarrhea is caused by Crypto, wait two weeks after symptoms have stopped before going 3  . Don't swallow the water while swimming.