DIN 127 Spring Lock Washers

DIN 127 (B) – 1987 Spring Lock Washers, With Square Ends -B type DIN 127 (A) – 1987 Spring Lock Washers, With Tang Ends-A type

Additional information

DIN 7980 Specifications

All measurements in millimeters (mm)

d1	used for	s	d2
3.1	M3	1	5.6
4.1	M4	1.2	7
5.1	M5	1.6	8.8
6.1	M6	1.6	9.9
8.1	M8	2	12.7
10.2	M10	2.5	16
12.2	M12	2.5	18
14.2	M14	3	21.1
16.2	M16	3.5	24.4
18.2	M18	3.5	26.4
20.2	M20	4.5	30.6
22.5	M22	4.5	32.9
24.5	M24	5	35.9
27.5	M27	5	38.9
30.5	M30	6	44.1
33.5	M33	6	47.1
36.5	M36	7	52.2

The principle of anti-loosening of spring washers:

The principle of the loose stop of the spring washer is that after the spring washer is flattened, the spring washer generates a certain spring force, so that the screw connection part of the nut and the bolt maintains friction, thereby preventing the loosening of the nut. At the same time, the acute corners of the opening of the spring washer are respectively inserted into the surface of the bolt and the connecting member, thereby preventing the bolt from rotating the connecting member.