The washers are made in spring steel, blue or zinc plated..

Compared to standard and special size, four wings washers have the following advantages :
- STRONGER FIXING FOR HIGH PERFORMANCES
- EASIER TRUE
They require much more pressure for assembly.

Identification: Washers "Autobloc" D.<dp> x 4 al.
Example: Washers "Autobloc" D.10x20 x 4 al.

Caps are made of shining nickel plated steel.

They can be assembled both with blue or zinc plated washer.

Identification: Caps. "Autobloc" D.<D>/<dp> x 4 al.
Example: Caps."Autobloc" D.16/6 x 4 al.