DIN 6796 Conical Disc Spring Washer

The DIN 6796 conical disc spring washer is made as a solid ring. What sets it apart from other similar fasteners is its cross-section shape: a truncated cone curved inward.

This washer configuration helps the fastening assembly effectively absorb static and dynamic loads in the axial direction, both during installation and throughout the service life.

The conical disc spring washer is not designed for repeated use: it undergoes slight deformation upon installation. The product withstands high loads and is used for tight fastening of threaded fastening elements.

Materials and equivalents of the DIN 6796 conical disc spring washer

The term “spring” in the fastener’s name refers not only to its working mechanism but also to a material characteristic: such washers are most often made of spring steel. Another common material is alloy steel with zinc coating. The coating is applied by electroplating or hot-dip methods, mechanical treatment, or phosphating.

Austenitic chromium-nickel alloys, including those with molybdenum, occupy a special place among the source materials. Products made from them require no additional protection, are long-lasting, and do not lose their properties on contact with moist or aggressive media.

Conical disc spring washers are produced not only to the German DIN 6796 standard. In Russia, GOST 13439-68 is in effect, under which similar products are manufactured. The word “equivalent” is not entirely accurate here: the technical characteristics of products made to these standards are close but not identical. This should be taken into account when selecting washers, and products should be purchased whose parameters comply with the project or drawing requirements.

Selection and installation features of DIN 6796 conical spring washers

For the washer to fully perform its function, it must be correctly selected and installed. The inner diameter of the product must match the metric thread of the bolt fastener. The properties of the washer material are also important — ideally, all elements of the fastening assembly are made from the same raw material.

The washer is placed on the working shank with its convex side facing the head of the bolt/screw/stud, while the concave surface faces the base plane. When tightened, the washer springs, exerting a locking action on the fastener and preventing it from rotating in the installation channel. The wide disc area prevents deformation of the surfaces of the materials being joined during tightening of the assembly.

FLOK supplies DIN 6796 conical spring washers in the materials listed above: spring, carbon, and stainless steel grades. The geometric parameters of the products vary within a wide range. The inner diameter size ranges from 6.4 mm to 31.0 mm for metric threads M6–M30. The outer diameter is 14–70 mm. The disc width ranges from 7.6 mm to 39 mm, with a thickness of 1.5–7.0 mm.

DIN 6796 conical spring washers from FLOK

FLOK works with legal entities and individuals on both a one-time and long-term basis. For non-standard washer dimensions, FLOK accepts orders for manufacturing products that meet the technical requirements of the base standards.

Dimensions of the DIN 6796 conical spring washer

d	d1	d2	s
M6	6.4	14.0	1.5
M8	8.4	18.0	2.0
M10	10.5	23.0	2.5
M12	13.0	29.0	3.0
M16	17.0	39.0	4.0
M20	21.0	45.0	5.0
M24	25.0	56.0	6.0
M27	28.0	60.0	6.5
M30	31.0	70.0	7.0

d	d1	d2	s
M2.5	2.7	6	0.5
M3	3.2	7	0.6
M4	4.3	9	1.0
M5	5.3	11	1.2
M6	6.4	14	1.5
M8	8.4	18	2.0
M10	10.5	23	2.5
M12	13.0	29	3.0
M14	15.0	35	3.5
M16	17.0	39	4.0
M18	19.0	42	4.5
M20	21.0	45	5.0
M22	23.0	49	5.5
M24	25.0	56	6.0
M27	28.0	60	6.5
M30	31.0	70	7.0

Designations:

d - fastener thread size

d1 - inner diameter of the washer

d2 - outer diameter

s - washer thickness