SHAKE - PROOF WASHERS
( Star Washers )

Inside
Diameter
d 1

d 2

d 3

S 1

S 2

       Number
     of   teeth              Minimum   TYPE
 A and  J            V

            Weight   kg/1000 
pieces~  TYPE
     A                   J                 V

      For screw
   
 Metric      Whitworth
1.8 3.8 - 0.3 - 6 - 0.015 - - M 1.7   
2.2 4.5 4.6 0.3 0.2 6 6 0.025 0.030 0.020 M 2   
2.5 5 5.1 0.4 0.2 6 6 0.030 0.040 0.025 M 2.3   
2.8 5.5 5.6 0.4 0.2 6 6 0.040 0.045 0.025 M 2.6   
3.2 6 6.2 0.4 0.2 6 6 0.045 0.045 0.025 M 3   
( 3.7 ) 7 6.7 0.5 0.25 6 6 0.075 0.085 0.040 M 3.5   
4.3 8 7.8 0.5 0.25 8 8 0.095 0.100 0.050 M 4   
5.1 9 - 0.5 - 8 - 0.140 0.150 - M 5   
( 5.3 ) 10 10 0.6 0.3 8 8 0.180 0.200 0.120 M 5*)    
6.4 11 11 0.7 0.4 8 10 0.220 0.250 0.200  M 6   
7.4** ) 12.5 - 0.8 - 8 - 0.300 0.350 - M 7   
8.2 14 - 0.8 - 8 - 0.400 0.450 - M 8   
( 8.4 ) 15 14.5 0.8 0.4 8 10 0.450 0.550 0.400 M 8*)   
10.5 18 18 0.9 0.5 9 10 0.800 0.900 0.700 M 10   
12.5 20.5 26 1 0.5 10 10 1.10 1.30 1.20 M 12   
( 13.2 ) 22 - 1 - 10 - 1.30 1.50 -   1/2''
( 14.5 ) 24 29 1 0.6 10 12 1.70 2.00 1.40 M 14  
16.5 26 32 1.2 0.6 12 12 2.10 2.50 1.40 M 16 5/8''
( 19 ) 30 - 1.4 - 12 - 3.50 3.70 - M 18  
( 20 ) 32 - 1.4 - 12 - 3.60 3.90 -   3/4''
21 33 - 1.4 - 12 - 3.80 4.10 - M 20  
( 23 ) 36 - 1.5 - 14 - 5.00 6.00 - M 22 7/8''
25 38 - 1.5 - 14 - 6.00 6.50 - M 24  
( 26 ) 40 - 1.6 - 14 - 6.30 7.10 -   1''
28 44 - 1.6 - 14 - 8.00 8.50  - M 27  
31 48 - 1.6 - 14 - 9.00 9.50 - M 30 11/2

    Bracketed sizes should be avoided where possible.   * ) Only valid for hexagon screws with the previous width across flats 9 or 14 mm.  
                                                                                       ** ) Only for automotive engineering purpose  
     Material : Spring steel ( to DIN 17222 ), HRC = 44 to 410   HV = 410 to 490 kg / mm2   

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