Fasteners – Hot dip galvanized coatings (ISO + Cor. ); German version EN ISO + AC Buy DIN EN ISO FASTENERS – HOT DIP GALVANIZED COATINGS from SAI Global. Verbindungselemente – Feuerverzinkung (ISO ) mechanical fasteners and accessories”, the secretariat of which is held by DIN.

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Further specific values can be found in DIN This tapping leaves the internal threads exposed not covered with zincbut it has no detrimental effects on the corrosion resistance, as illustrated further below.

Need more than one copy? The time that steel remains protected from corrosion is proportional e the thickness of the zinc layer, and it is dependent on the climatic conditions, as shown in the graphic below.

You may delete a document from your Alert Profile at any time. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. This standard is not included in any packages.

Please refer to EN for details. If the document is revised or amended, you will be notified by email. The process of hot dip galvanizing is quite simple: Your shopping cart is empty.

This system can offer 1. Please first verify your email before subscribing to alerts. What remains is a layer of zinc 40 to 70 microns on the surface of the products that is relatively thick compared to zinc electroplating 3 to 20 microns. The HDG process is commonly regarded as suitable for fasteners with diameters M8 or larger.


The zinc layer on the bolt thread completely overtakes the protection of the uncoated nut thread. Polski English Select Language: Need more than one copy? Nut threads must always be tapped after HDG.

The standard specifies material, procedure, dimensions and some performance requirements for hot dip galvanizing of fasteners made of steel with thread.

This standard is also available e be included in Standards Subscriptions. The nut oversize limits are standardized in Eand the thread tolerance class of the oversize tapped nuts is designated as 6AZ.

When the coating is exposed to the atmosphere, a layer of corrosion products zinc patina is built up. At locations where there are gaps in the zinc layer of 1. Due to the deviation of the thread tolerances, the screw thread of the bolt is allowed to strip at the minimum ultimate tensile load. As the voice of isl U. Nederlands English Select Language: Standards Subsctiption may be the perfect solution.

Nuts are processed in the same way, except the nut thread is not yet formed. Standards Subsctiption may be the perfect solution. Add to Alert PDF. When galvanized, steel remains wet for a longer period, and there is insufficient air circulation.

Already Subscribed to this ddin. Add to Alert PDF. Magyar English Select Language: The two systems must never djn mixed, as mixing leads either to fitting problems oversized bolt with ISO fit nut or critical strength reductions of the threaded connection ISO lso bolt with oversized nut.

An example of this phenomenon is the screw thread of hot dip galvanized nuts that are tapped after galvanizing. This 106684 is also available to be included in Standards Subscriptions. The large amount of zinc provides excellent corrosion resistance in normal outdoor environments, but with the downside that its layer thickness is significantly above the thread clearance allowance, which this poses a problem for all threaded fasteners.


Because zinc is less noble than iron steelthe zinc dissolves first, which protects the steel against corrosion until all of the zinc has dissolved.

BS EN ISO 10684:2004

As the voice of the U. We have no document history for this standard.

When properly degreased, hot dip galvanizing offers effective adhesion for many types of paint. This standard is not included in any packages. Hot dip galvanizing for steel parts is standardized in ISObut for fasteners, rn dedicated standard ISO exists. Subscription pricing is determined uso We have no amendments or corrections for this standard. It provides a very solid and durable corrosion protection.

In case the zinc coating is scratched or chipped, the zinc layer attempts to cover the damaged area in normal atmospheric environments.

We have no document history for this standard.

BS EN ISO – Fasteners. Hot dip galvanized coatings

This graphic should be consulted only for rough estimates due to unforeseeable local influences. Please first verify your email before subscribing to alerts.

We have no amendments or corrections for this standard.