DIYUK A2 Stainless Steel Split Lock Spring Washers M20, DIN 127B Helical Anti-Vibration Washer, Plain Uncoated, Pack of 10

Spring action keeps a bolted joint under load, so vibration and repeated movement are less likely to loosen it. A2 stainless steel, so the washer resists corrosion outdoors and in damp conditions. Size M20: inside diameter 20.2mm, outside diameter 33.6mm and 4.0mm thick, to DIN 127B; fourteen sizes from M2 to M22. Made to DIN 127B for shape and dimensions, confirmed by the manufacturer declaration of conformity. No coating to wear through or flake off. Pack of 10: quick to fit, the washer goes under the nut or bolt head and needs no tools of its own.