Washer DIN 6797A

Description

The DIN 6797A washer is a disc-shaped fastener, designed to distribute the load of a screw or bolt over a larger surface, preventing damage to the base material. Its design includes a raised edge that provides a better fit and prevents loosening due to vibrations, improving the stability of the joint in mechanical applications.

Assembly

For the assembly of the DIN 6797A lock washer, the washer must be placed on the bolt or screw before inserting it into the corresponding hole. Make sure the washer face is in contact with the surface of the base material, ensuring that the washer teeth are facing the screw. Tighten the screw to its specified torque, thus ensuring correct fixation and preventing loosening due to vibrations.

Materials

DIN 6797A washers are made of carbon steel, stainless steel (A2, A4) and plastic (Nylon). Finishes include galvanizing, phosphating, nickel plating, and powder coatings, which improve resistance to corrosion and wear. The choice of material and finish depends on the application environment and the expected mechanical loads.

Technical data

Para / For	D1	D2	H	S
M2	2.2	4.5	0.6	0.3
M2.3	2.5	5	0.8	0.4
M2.5	2.7	5.5	0.8	0.4
M3	3.2	6	0.8	0.4
M3.5	3.7	7	1	0.5
M4	4.3	8	1	0.5
M5	5.3	10	1.2	0.6
M6	6.4	11	1.4	0.7
M7	7.4	12.5	1.6	0.8
M8	8.4	15	1.6	0.8
M10	10.5	18	1.8	0.9
M12	13	20.5	2	1
M14	15	24	2	1
M16	17	26	2.4	1.2
M18	19	30	2.8	1.4
M20	21	33	2.8	1.4
M22	23	36	3	1.5
M24	25	38	3	1.5
M27	28	44	3.2	1.6
M30	31	48	3.2	1.6

Technical drawing and installation parameters of the DIN 6797A external serrated lock washers

This technical diagram defines the dimensions and geometric variables that are essential for the correct selection and installation of the DIN 6797A external serrated lock washer, whose teeth bite into the mating surfaces as the joint is tightened. It shows the critical dimensions linked to the specification tables, such as the thread size of the bolt or nut it accompanies, the inside diameter (d1), the outside diameter measured over the tips of the teeth (d2), the material thickness (S) and the maximum height of the washer in the free state (H). Complying with these dimensions ensures the anchoring effect and the increased friction between the parts, which is what prevents the joint from loosening under vibration.

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