1. Made out of Gr. 2, Gr.5 and other grades with high strength and corrosion resistence. 2. Experienced engineer do the check. Titanium plain washer.1.Grade 1, 2, 5, 12 and other grades are available2.UNC, UNF, Metric and DIN are available.3.Custom products available.4.Applied to auto racing, bicycle, motorcycle, chemical, marine, medical and other industries. Titanium Plain Washer