Washer according to WT standard WT-U-2017 made of plastic (see material properties).

Standard plastics for our fiberglass-reinforced plastic washers are ABS and polyamide (PA) with 30% glass fiber content.

PA with 50% or 60% glass fiber content, or PE, POM... essentially all common thermoplastics, are feasible upon request, including in color as per customer preference.

The mechanical and physical properties, particularly tensile strength, are subject to environmental conditions. Practical testing is recommended.