DIN 1052 Flat Washer Enlarged

In accordance with the German standard DIN 1052, the enlarged flat washer is designed for joining timber structures in house building and furniture manufacturing. Together with bolts, screws, studs and nuts, the product forms a strong fastening joint thanks to its flat shape and enlarged dimensions.

DIN 1052 washers are manufactured with an inner diameter from 14 mm to 27 mm, matching the metric thread of the main fastener within the M12–M24 range. The outer diameter is enlarged: from 58 mm to 105 mm, with a thickness of 6–8 mm. These dimensions preserve the integrity of the timber surface even under significant tightening force. This is especially important when joining elements made of softwood.

Composition of a fastening assembly using the DIN 1052 enlarged flat washer

Various steel alloys are used to manufacture washers, with carbon steel occupying the main place among them. Washers made of this material can be “black” or coated with an anti-corrosion coating applied by galvanic or hot-dip galvanizing methods.

Backing washers made of stainless steel are also popular. The chromium-nickel alloy grade A2 offers high resistance to moisture, while products made of A4-grade metal, which contains molybdenum, withstand exposure to acids, alkalis and seawater for a long time.

The DIN 1052 enlarged flat washer works as part of a single assembly with connecting nuts, locking hardware and threaded fasteners, creating reliable joints when assembling parts and structures. Their use is most effective when installing massive timber elements.

If you are interested in enlarged flat metal washers meeting the requirements of the German standard DIN 1052, FLOK supplies them in the required range and quantity.

Dimensions of the DIN 1052 enlarged flat backing washer, in mm:

d	d1	d2	s
M12	14	58	6
M16	18	68	6
M20	23	80	8
M22	25	92	8
M24	27	105	8