Quality
Quality has always been an integrated part of company policy. Not only concerning the technical aspects of the threaded rods, but also concerning the performance to our customers, and environmental issues relating to production and packaging.
Bodegraven Metaal n.v. is certified according to ISO 9002(1994) and 9001(2000) by TÜV. This guarantees full trace-ability for the qualities 8.8 and Stainless, these qualities can be supplied with certificates.
Norms
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DIN 976-1
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Threaded rods with metric thread
This norm describes the length tolerances, and a list of all other relevant norms. |
ISO 898/1
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Mechanical properties of fasteners made of carbon steel and alloy steel
This norm gives the properties for the grade indication of fasteners |
EN ISO 4042
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Electroplated coatings of fasteners
This norm states the different qualities of electroplating, and their properties. |
DIN 267-10
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Electroplated coatings of fasteners
This norm states the different qualities of electroplating, and their properties. |
DIN ISO 3506
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Corrosion-resistant stainless steel fasteners
This norm states the most popular kinds of stainless steel used for fasteners, and their properties. |
NBN EN 10204
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Metallic products- Type of inspection documents
This norm gives a view of the different kind of certificates, and what you can expect from them. |
DIN 13-13
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ISO metric thread.
This norm is about the tolerances of the ISO metric thread itself. |
DIN 13-14
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Tolerance system of metric thread.
This norm explains the working of the tolerance system for metric thread.
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Surface treatments
We can supply our threaded rods with different surface
treatments, of which the following are the most common:
Self colour
Has no treatment.
Electroplated. (EN ISO 4042)
Is called Bright Zinc Plated (BZP) and is adding a thin layer of zinc through a electro/chemical
process. In general very thin (3-5 Mµ) and is for use indoors.
Hot dip galvanising (DIN 267-10)
Is adding a layer of zinc, by dipping it in a heated liquid zinc bath. This causes an alloy between
zinc and steel. This layer is a lot thicker (40-60Mµ) compared with electroplating. This can be used
outdoors, but, due to the process, the tolerances and straightness can cause some problems.
Delta Seal (Duplex)
Is a "duplex" system, meaning first a layer of BZP and then a top layer of Delta Seal. This gives a
lot higher corrosion resistance.
Colour Codes
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The different qualities are marked with a colour code on the head of the threaded rods. This code
is followed by the majority of the European producers and distributors.
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4.8
8.8
SS 304-A2
SS 316-A4
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No colour code
Yellow (RAL 1021)
Green (RAL 6018)
Red (RAL 3000)
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| 10.9 |
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White (RAL 1013) |
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