Washer DIN 7349 for Spring Pin
FLOK supplies DIN 7349 washers for spring pins to DIN 1481: sizes M3–M30, steels A2, A4, zinc-plated. For mechanical engineering and construction.
The DIN 7349 washer is designed to work together with a spring pin to DIN 1481, which is why it has an increased thickness. The product is shaped as a disc with a central hole for heavy metal rods with metric thread from M3 to M30. The washer has flat surfaces on both sides, allowing it to be fitted more tightly against the parts being joined.
Installation features
The DIN 7349 washer centers the working channels of the joined elements and fastener parts relative to one another. Usually two washers are installed in the assembly at once: one on the bushing side, the other under the bolt head.
Once all the parts are installed and the holes are aligned, the threaded fastener is installed and tightened securely. In this process, the washer is also responsible for preserving and increasing the bearing surface area. In addition, the DIN 7349 washer performs a locking function, helping to reduce external pressure on the fastening assembly as a whole.
Where DIN 7349 washers are used together with spring pins
Since this item of hardware has a special purpose, it is installed where high operational loads of a moving, transverse, cyclic nature are expected.
The DIN 7349 washer is used in heavy mechanical engineering, in construction, and in the assembly of critical components of machines, units and structures. This type of hardware is manufactured in a wide range of size parameters from high-strength alloy steel grades with galvanic zinc-plated coating. Austenitic chromium-nickel alloys of class A2 and A4 are also used to produce these fasteners.
The technical characteristics of the source materials account for the high resistance of the DIN 7349 washer for spring pins to moisture and aggressive environments. Products made of A4 stainless steel do not lose their properties on contact with acids, alkalis, or salts. This property is useful for shipbuilders, as well as specialists building bridges and coastal structures, to take into account.
FLOK supplies DIN 7349 washers and other fasteners to legal entities and individuals under one-off and long-term contracts.
| d | d1 | d2 | s |
|---|---|---|---|
| M6 | 6.4 | 17.0 | 3.0 |
| M8 | 8.4 | 21.0 | 4.0 |
| M10 | 10.5 | 25.0 | 4.0 |
| M12 | 13.0 | 30.0 | 6.0 |
| M16 | 17.0 | 40.0 | 6.0 |
| M20 | 21.0 | 44.0 | 8.0 |
| M24 | 25.0 | 50.0 | 10.0 |
| M27 | 28.0 | 60.0 | 10.0 |
| M30 | 31.0 | 68.0 | 10.0 |
Dimensions of heavy-duty DIN 7349 washers for bolts with pins, mm
| d | d₁ | d₂ | s | f |
|---|---|---|---|---|
| M3 | 3.2 | 9 | 1 | 6 |
| M4 | 4.3 | 12 | 1.6 | 8 |
| M5 | 5.3 | 15 | 2 | 10 |
| M6 | 6.4 | 17 | 3 | 12 |
| M8 | 8.4 | 21 | 4 | 16 |
| M10 | 10.5 | 25 | 4 | 18 |
| M12 | 13 | 30 | 6 | 21 |
| M14 | 15 | 36 | 6 | 25 |
| M16 | 17 | 40 | 6 | 28 |
| M18 | 19 | 44 | 8 | 32 |
| M20 | 21 | 44 | 8 | 35 |
| M22 | 23 | 50 | 8 | 38 |
| M24 | 25 | 50 | 10 | 40 |
| M27 | 28 | 60 | 10 | 45 |
| M30 | 31 | 69 | 10 | 50 |
Designations:
d - bolt thread size
d₁ - washer inner diameter
d₂ - outer diameter of the washer
s - washer thickness
f - pin length
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