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Serrated lock washers


DIN 6907
Toothed washers for pre-assembled screws

Toothed washers type DIN 6907 are exclusively reserved for pre-assembly with metric pitch screws.
They can be produced and supplied only upon customer's request.

Scheda prodotto - DIN 6907
SIZE WASHER DIMENSIONS COMPLEMENTARY DATA WEIGHT
screw mm
d
min
d
max
D
h13
tol
h
min
h
max
s
tol
teeth no.
Load test
Torsion torque
(Nm)
Kg/1000
2,5 2,24 2,30 5,50 0 -0,180 1,00 1,25 0,40 0,020 -0,020 9 0,81 0,058
3 2,70 2,77 6,00 0 -0,180 1,00 1,25 0,40 0,020 -0,020 9 1,40 0,067
3,5 3,18 3,25 7,00 0 -0,220 1,25 1,50 0,50 0,025 -0,025 10 2,17 0,108
4 3,59 3,67 8,00 0 -0,220 1,25 1,50 0,50 0,025 -0,025 11 3,30 0,146
5 4,55 4,64 9,00 0 -0,220 1,45 1,70 0,60 0,025 -0,025 11 6,70 0,205
6 5,45 5,55 11,00 0 -0,270 1,80 2,05 0,70 0,030 -0,030 12 11,20 0,359
7 6,45 6,55 12,50 0 -0,270 1,80 2,10 0,80 0,030 -0,030 14 18,00 0,500
8 7,30 7,45 14,00 0 -0,270 2,10 2,40 0,80 0,030 -0,030 14 27,00 0,638
10 9,18 9,33 18,00 0 -0,270 2,30 2,70 0,90 0,030 -0,030 16 53,00 1,221
12 10,98 11,13 20,50 0 -0,330 2,60 3,00 1,00 0,030 -0,030 16 93,00 1,700
Dimensions in mm 
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Materials used

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Spring steel EN 10132 - 1/4 (DIN 17222)
Ø from 2,5 to 12 mm: strip C60S (C60)

Hardness

Ø from 2,5 to 12 mm: HV 350 ÷ 425, HRC 36 ÷ 43

Standard surface finish

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Ø from 2,5 to 12 mm: self-finished and oiled

Packaging

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To be defined in the order.