CSN EN 3016

EN 3016

EN 3016 Aerospace series - Washers countersunk, load spreading - Heat resisting steel - This standard specifies the characteristics of heat resisting steel, countersunk, load spreading washers for use in aerospace applications at temperatures not exceeding 650 °C. They are intended primarily for use under the head of bolts with strength classification up to 1 250 MPa. They are used to provide sufficient bearing area to prevent indentation of parent metals with low compressive strength at operating temperatures, thus ensuring no relaxation in the bolt load occurs.

Original English text of CSN EN Standard.
The price of the Standard included all amendments and correcturs.