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NFE 25-511 Dacromet Contact Washers
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  • NFE 25-511 Dacromet Contact WashersNFE 25-511 Dacromet Contact Washers

NFE 25-511 Dacromet Contact Washers

If you are looking to purchase NFE 25-511 Dacromet Contact Washers in any quantity, please consider Fengyi for your direct purchasing needs. We will be your source for quality fastening products at factory prices. In addition, we can also produce according to drawings or samples to meet your requirements.

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Product Description


Taking into account the locking effect of NFE 25-511 Dacromet Contact Washers, the thickness of the French washer is stipulated so that its corrected load is slightly lower than the operating pressure of the grade 8.8 screw. In this case, the pressure distribution on the part to be tightened is slightly uneven. If it is necessary to achieve the maximum elastic reaction force of the gasket during assembly, it is best to use a suitable smooth tapered gasket. When installing striped tapered gaskets, the concave surface must be facing the side of the tightened part.

Product Information

Brand: Fengyi
Material: Spring Steel
Surface treatment: Dacromet
Standard number: NFE25511




NFE25-511 Knurled Spring Washers
size d1 d2 H d3 d4 h

Nominal Size min max Nominal Size min max min max min min max
M3 3 3.1 3.35 6 5.76 6.24 0.7 0.9 5.5 3.6 4.1 0.5
8 7.71 8.29 0.8 1 5.5 3.6 4.1 0.6
10 9.71 1029 0.95 1.2 5.5 3.6 4.1 0.6
M4 4 4.1 4.4 8 7.71 8.29 1 1.2 7 4.7 5.2 0.8
10 9.71 10.29 1.15 1.4 7 4.7 5.2 0.9
14 13.65 14.35 1.4 1.8 7 4.7 5.2 1
M5 5 5.1 5.4 10 9.71 10.29 1.25 1.5 8 5.7 6.2 1
12 11.65 12.35 1.45 1.8 8 5.7 6.2 1.1
16 15.65 1635 1.7 2.1 8 5.7 6.2 1.2
M6 6 6.1 6.4 12 11.65 12.35 1.55 1.85 10 6.8 7.4 1.2
14 13.65 14.35 1.75 2.1 10 6.8 7.4 1.3
18 17.65 18.35 2.1 2.5 10 6.8 7.4 1.4
M8 8 8.2 8.58 16 15.65 16.35 1.8 2.2 13 9.2 9.8 1.4
18 17.65 18.35 1.9 2.35 13 9.2 9.8 1.4
22 21.58 22.42 2.2 2.7 13 9.2 9.8 1.6
M10 10 10.2 10.56 20 19.58 20.42 2.1 2.6 16 11.2 11.9 1.6
22 21.58 22.42 2.25 2.75 16 11.2 11.9 1.6
27 26.58 27.42 2.6 3.1 16 11.2 11.9 1.8
M12 12 12.4 12.83 24 23.58 24.42 2.4 0.29 18 13.7 14.4 1.8
27 26.58 27.42 2.6 3.1 18 13.7 14.4 1.8
32 31.5 32.5 3.1 3.6 18 13.7 14.4 2
M14 14 14.4 14.83 30 29.58 30.42 3.2 3.7 21 15.7 16.4 2.4
M16 16 16.4 16.83 32 31.5 32.5 3.6 4.1 24 17.7 18.4 2.8
M20 20 21.02 21.02 40 39.5 40.5 4.3 4.9 30 23.1 22.8 3.2

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