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 Round Head Rivets
  Also called Button, Cup, Dome or Snap Head       Metric Sizes

Solid Round Head Rivet - schematic
 

Small Solid Metric Rivets for General Engineering Purposes

DIN 660   Round Head Rivets
Up to 8 Millimetres Diameter - All Dimensions in Millimetres - All Materials

Shank Diameter

Head Diameter 

Head Depth

Setting

  Nominal
  D

Tolerance
 

   Nominal
   A=1.75D

Tolerance
 

Nominal
  B=0.6D

Tolerance
 

Allowance
S=1.063D

1

 0.93 /  1.05

1.8

 1.55 /  1.80

 0.6

 0.48 /  0.73

 1.06

1.2

 1.13 /  1.25

2.1

 1.85 /  2.10

 0.7

 0.58 /  0.83

 1.28

1.4

 1.33 /  1.45

2.4

 2.15 /  2.40

 0.8

 0.68 /  0.93

 1.49

1.6

 1.52 /  1.65

2.8

 2.55/  2.80

 1.0

 0.88 /  1.13

 1.70

2

 1.87 /  2.10

3.5

 3.20 /  3.50

 1.2

 1.08 /  1.33

 2.13

2.5

 2.37 /  2.60

4.4

 4.10 /  4.40

 1.5

 1.38 /  1.63

 2.66

3

 2.87 /  3.10

5.2

 4.90 /  5.20

 1.8

 1.68 /  1.93

 3.19

3.5

 3.37 /  3.60

6.2

 5.62 /  6.20

 2.1

 1.98 /  2.23

 3.72

4

 3.87 /  4.10

7.0

 6.42 /  7.00

 2.4

 2.28 /  2.53

 4.25

5

 4.82 /  5.15

8.8

 8.22 /  8.80

 3.0

 2.88 /  3.13

 5.32

6

 5.82 /  6.15

10.5 

 9.80 / 10.50 

 3.6

 3.45 /  3.75

 6.38

7

 6.82 /  7.15

12.2 

11.50 / 12.20 

 4.2

 4.05 /  4.35

 7.44

8

 7.76 /  8.20

14.0 

13.30 / 14.00 

 4.8

 4.65 /  4.95

 8.50

There is no positive tolerance on Head Diameter and no negative tolerance on Shank Length.
Shank Length has a positive tolerance
according to IT14 from ISO 286-2 (+0.25 to +0.62 depending on actual length).
It is normal to have a radius under the head.
DIN 660 is the same as BS 4620 Table 1, but with differing tolerances.