Fasteners
Panel and chassis screws
From Lelit's parts diagram. Only the Torx T20 is stated outright. For the cross-head screws the diagram gives the head but no driver size, so the sizes below are the standard ones for that screw. None of the screws is modelled.
Group, boiler and steam tap screws
The screen's centre screw is the one fastener an owner meets, and the one nobody agrees on. The diagram calls it 5 × 16; one seller lists it as an M5 × 13 Torx, another as a hex screw. If it is hex, 3 mm is the standard key; if Torx, T25 is usual for M5. Neither is confirmed.
Nuts, washers and other hex sizes
The diagram states one spanner size, 14 mm. The rest are either standard sizes for that nut or sizes reported by a retailer or owners, as marked.
The diagram also names its sealants and grease: Loxeal 85-86 and Loxeal 55-03 on threads, and Molykote G-1502 on the wand's ball joint. Owners use PTFE tape on the fittings on top of the boilers and Molykote 111 on valve o-rings.