Midwest Fasteners Flat Washer 2.5mm Zinc SKU: 337374 MODEL: 87288 Error. try again later You've successfully joined the club $ 2 .99 pack of 2 Available on orders $50 to $1500. More info × Mitre 10 SAvailable at selected stores. Check your local store for details Variants Made of steel and zinc plated for appearance and increased corrision resistance. To be used with the same diameter of metric screw. Engineered to be used with smaller metric sizes. Features and benefits Designed to increase the clamping surface of the screw. Designed to cover any imperfections in the material being fastened into.