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Spring and knurled washers


DIN 137 A
Spring washers, bowed

Spring washers DIN 137 A are recommended for locking lightweight components onto soft materials.

Scheda prodotto - DIN 137 A
SIZE WASHER DIMENSIONS WEIGHT
screw
mm
d1
H14
tol
d2
js16
tol
h
min
h
max
s
tol
Kg/1000
2 2,20 0,250 0 4,50 0,375 -0,375 0,50 1,00 0,30 0,030 -0,030 0,027
2,3 2,50 0,250 0 5,00 0,375 -0,375 0,50 1,00 0,30 0,030 -0,030 0,032
2,5-2,6 2,80 0,250 0 5,50 0,375 -0,375 0,55 1,10 0,30 0,030 -0,030 0,039
3 3,20 0,300 0 6,00 0,375 -0,375 0,65 1,30 0,40 0,050 -0,050 0,057
3,5 3,70 0,300 0 7,00 0,450 -0,450 0,70 1,40 0,40 0,050 -0,050 0,078
4 4,30 0,300 0 8,00 0,450 -0,450 0,80 1,60 0,50 0,050 -0,050 0,126
5 5,30 0,300 0 10,00 0,450 -0,450 0,90 1,80 0,50 0,050 -0,050 0,204
6 6,40 0,360 0 11,00 0,550 -0,550 1,10 2,20 0,50 0,050 -0,050 0,230
7 7,40 0,360 0 12,00 0,550 -0,550 1,20 2,40 0,50 0,050 -0,050 0,250
8 8,40 0,360 0 15,00 0,550 -0,550 1,70 3,40 0,50 0,060 -0,060 0,437
10 10,50 0,430 0 18,00 0,550 -0,550 2,00 4,00 0,80 0,060 -0,060 0,960
Dimensions in mm 
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Materials used

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Spring steel EN 10132 - 1/4 (DIN 17222)
Ø from 2 to 10 mm: strip C60S (C60)

Hardness

Ø from 2 to 8 mm: HV 526 ÷ 575, HRC 50 ÷ 53
Ø 10 mm: HV 510 ÷ 558, HRC 49 ÷ 52

Standard surface finish

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Ø from 2 to 10 mm: self-finished and oiled
Ø 2 and Ø from 2 to 10 mm: mechanical zinc plating  
Ø 2,3 and 2,5 mm: electrolytic zinc plating

Packaging

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Additional information

Packaging on request
Upon request and for quantities / prices to be established, spring washers DIN 137 A can be supplied in bulk packaging.