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Nibby Pit MCS Ltd.

QUALITY FLAT Washers made from A4 Stainless Marine Grade Stainless Steel.

Simply pick from the drop down list the size and quantity required

They are DIN 125 -1A. These are probably the most commonly used washer in the world
Stainless Steel fasteners should be used when you need to minimise the risk from corrosion.
A2 is a very good grade for this, but when you need that little bit more, for example in a marine environment, then it is best to go for A4
A4 grade then is also non magnetic and suitable for all the situations as A2 BUT has the added advantage of being suitable for Marine solutions.
The molybdenum increases the corrosion resistance to withstand attack from many industrial chemicals and solvents and of course, chlorides.
Used in the production of inks, photographic chemicals, surgical implants, and the marine environment

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Dimensions As Follows:

M3 (3mm) - Hole Diameter 3.3mm Outside Diameter 7mm Thickness 0.5mm
M4 (4mm) - Hole Diameter 4.3mm Outside Diameter 9mm Thickness 0.8mm
M5 (5mm) - Hole Diameter 5.3mm Outside Diameter 10mm Thickness 1.0mm
M6 (6mm) - Hole Diameter 6.3mm Outside Diameter 12mm Thickness 1.6mm
M8 (8mm) - Hole Diameter 8.4mm Outside Diameter 16mm Thickness 1.6mm
M10 (10mm) - Hole Diameter 10.4mm Outside Diameter 20mm Thickness 2.0mm

Pic REF: ID (d1) OD (d2) Thickness (h)


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Information

Stainless Steel Grades and Classification
The two most commonly produced grades of stainless steel are 304 (known as 'A2') and 316 (known as A4).
Both of these grades will offer excellent corrosion resistance, cleanability, and the ability to handle extremely low (cryogenic) and high temperatures.
Grade 316 is also known as marine grade stainless steel due to its increased resistance to chloride corrosion compared to type 304.
The basic chemical compositions of these two grades are as below:
Grade 304 stainless steel (A2): chromium 18% + nickel 8% (known as '18/8')Grade 316 stainless steel (A4): chromium 18% + nickel 8% + molybdenum 3% (known as '18/8/3')
Stainless steel can also be classified by their crystalline structure, which is determined by their chemical composition.
The two grades mentioned above are Austenitic stainless steels. Other types include Ferritic, Martensitic, and Duplex.


The picture below shows an accurate sizing of one of our M8 Washers confirming the sizes.

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