All Size A2 A4 Cross Recessed Hex Head Metal Sems Screw Assembled With Washer Din9021

This SEMS screw has a hex head with an additional cross recess (dual drive) and comes with a DIN9021 large diameter flat washer pre‑assembled. The large washer provides a much bigger bearing surface than standard washers, making it perfect for soft materials or thin sheet metal with oversized holes. The screw is made of A2 (304) or A4 (316) stainless steel, strength classes 70 or 80. “All sizes" means diameters from M3 up to M12 can be supplied. The dual drive (hex + cross) allows installation with a wrench or a screwdriver – a useful feature for maintenance.

• Plastic and composite enclosures: large washer prevents embedment and cracking.

• Solar PV module frames: even load distribution on aluminium profiles.

• Home appliances: washing machine bases, refrigerator back panels.

• Curtain walls and aluminium composite panels: outdoor use with A4 stainless.

• Display racks and retail fixtures: easy installation with common tools.

• Extra‑large washer (DIN9021) – protects soft substrates (plastic, aluminium, wood).

• Dual drive (hex + cross) – use a wrench for high torque or a screwdriver for speed.

• All sizes coverage – one supplier for the whole range.

• Stainless steel durability – A2 for inland, A4 for coastal/chemical environments.

• DIN9021 standard – ensures consistent washer dimensions and fit.