Genuine Bosch flat washer — part number F016L09966. This original Bosch underlegscheibe (flat washer) is the exact replacement used in Bosch lawn & garden equipment (listed in Bosch exploded diagrams as position 75/32). It’s supplied as a single matching spare to restore correct fastener spacing and secure assemblies on models such as Club B20 / Club 20, Royale 20 and a range of Allett / Atco machines (Buckingham, Westminster and related models). Fits according to Bosch power tool parts diagrams and manufacturer part references, so you get the correct fit and factory specification for your machine.