These are new (as in they've never been used), but they are old,  and originally came with a screw inserted through the washer. The screws rusted a bit, so some washers may have a small rust or discoloration in the center. Please see pics for examples

OD is 1-13/32 inches OR 35mm

ID is 4mm

Thickness aprox 1.5mm

Steel washers for use with nails

Application: Membranes and drainage plates, Nets, fabric and similar, Plastic corrugated sheets, Fastening mesh, Conventional formwork, System formwork

For use with (tools): DX 460 MX, DX 5 MX, DX A40, DX A41

Corrosion protection: Galvanized zinc coated <20 µm

60x Hilti R-32 Direct Fastening Steel Washer O.D. 1-13/32 in 35mm THICK PREMIUM