Genuine Bosch part F016L18048 — a factory-numbered fastening nut (position 503 in Bosch exploded diagrams) made to the original Bosch specification for secure assembly in the mower chassis. 

Fits where shown in Bosch power tool parts lists for the AMR 30 (type 0600895003) and the SYSTEM 300 (parts diagram F016L80521); check the diagram position 503 on your unit to confirm it matches the location you need.

If you need a single replacement to complete a repair, this genuine Bosch nut is the exact-numbered component referenced in Bosch diagrams — a small, reliable item to finish the job and keep other power tool parts in the assembly secured to factory spec.

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