Plastic washers resist moisture,chemicals, and friction and are good electrical insulators. These have a large surface that distributes holding pressure to reduce the likelihood of crushing insulation.
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Steel washers provide a stronger bearing surface than plastic washers. These have a large surface that distributes holding pressure to reduce the likelihood of crushing insulation.
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With three points of surface contact, these washers provide more stability than single-wave washers. They are curved and flexible to act like springs, compensating for tolerance variations and uneven surfaces. You can also use them to damp vibration.
18-8stainlesssteel washers have good chemical resistance and may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.