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Dimensions in mm - source UNI 1751

Publication date: 01/1988 - Supersedes 12/1970

Thread size

d2 max

b nom

s1 nom

≈ weight in Kg x 1000 pcs (ρ=7,85 kg/dm3)

Type A

Type B

max

min

min.

max.

min.

max.

M 2

2.1

2.4

4.4

0.9

0.5

0.1

1.2

0.033

M 2.2

2.3

2.6

4.8

0.6

0.1

1.2

1.4

0.05

M 2.5

2.6

2.9

5.1

0.6

0.1

1.2

1.4

0.053

M 3

M 3.5

M 4

M 5

M 6

M 7

M 8

M 10

M 12

M 14

M 16

M 18

M 20

M 22

M 24

M 27

M 30

M 33

M 36

M 39

M 42

M 45

M 48

M 52

M 56

M 60

M 64

M 68

M 72

M 80

M 90

M 100



Dimensions in mm-Split lock washers commercial type
Nominal size	Thread size	d	b	s	D	≈ weight in Kg x 1000 pcs (ρ=7,85 kg/dm3)
3.2
4.3
5.3
6.4
7.4
8.4
10.5
12.5
15
17
19
21
23
25
28



Dimensions in mm-Split lock washers heavy type
nominal size	thread size	d	b	s	D	≈ weight in Kg x 1000 pcs (ρ=7,85 kg/dm3)
3.2
4.2
5.2
6.3
7.3
8.3
10.4
12.4
14.5
16.6
18.6
20.6
22.7
24.7

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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Standard UNI 1751