F016L18028 supersedes older part numbers: F016L18105

Allett F016L18028 — genuine Allett spring washer (single). A direct replacement spring/lock washer used on Allett cylinder and roller assemblies — supplied as one part and intended to restore the original retaining tension on bolts and spindles when servicing your mower.

This is the same spring washer referenced across classic Allett/Atco/Qualcast parts diagrams and is commonly found in spindle, roller and clutch-fastening positions on cylinder mowers. Example machines that use the same style part include Club B20 / Royale B20 family machines (and other Atco/Qualcast/Allett cylinder mower models listed in parts diagrams).

Why this part matters: it keeps fasteners tensioned under vibration so cylinders, rollers and clutch linkages stay secure — replacing a worn or flattened spring washer restores proper preload and reduces loosening. Supplied as a single genuine Allett part (F016L18028).

Note: check your mower’s exploded parts diagram or the part position number to confirm F016L18028 matches the washer called out for your machine before fitting.