Knowledge base

 hexagonal head – 6K

  hexagonal head with washer – 6P

  hexagon washer head with serration – 6Pz

 with washer – P

 with serrated washer – Pz

 head with ribbed washer – Pc

 flat head – S

 oval head – T

 mushroom head with square neck – ZG

 flat head with squere neck – ZS

 round – K

 pan head – W

 pan head, serrated – Wz

 cylindrical – C

 square – 4K

 hexagon washer head – 6P*

 cross (Pozidriv) – PZ

 cross (Philips) – PH

 slotted – ZW

 kombi (Pozidriv) – KOMBI

 kombi (Phillips) – KOMBI

 hex socket – IM

 Torx – TX

 T-KOMBI torx – TK

 KOMBI (square) – 4K

 tri-wing – 3S

 torgu-set

 square – I4

 octagonal – I8

 clutch – IS

 cross slotted – ZK

 slotted one-way – ZJ

 spanner slotted one-way – ZZ

 KOMBI hex socket – IK

 carbon steel

 hardened product

 stainless steel

 acid-proof steel

 aluminium alloy

 aluminium alloy

 brass

 copper

 aluminum

 EPDM rubber

 polyethylene

 polypropylene

 polyamide

 PVC material (polyvinyl chloride)

 zinc coating

 8µm, 12µm, 15µm zinc galvanic coating

 yellow passivation zinc coating

 white passivation zinc coating

 black passivation zinc coating

  Zintec zinc coating – white

 silver-coloured ceramic coating

 nickel coating

 brass-plated coating

 bluing

 phosphating

 hot-dip galvanisation

 Geomet

 Zintec zinc coating – black

 Statuary Bronze Plated

Electrolytic zinc coatings are commonly used protective coatings. The anti-corrosive properties of these coatings depend to a great extent on their thickness. The standard thickness of zinc coating we use during the production is 5pm. We also offer other thicknesses per Client’s request.

When choosing the thickness of the coating, you must take into account additional damaging factors, like: condensation of water vapour, the presence of damaging gases and vapours, the presence of electrolyte solutions, dust and sand.

The physical, chemical and mechanical properties of zinc coatings have an influence on products’
performance characteristics. These properties limit the use of coatings in the food industry and for
products requiring high hardness of the top coat. In such cases, zinc coatings are replaced with other,
adapted to specific working conditions.

In some cases, specially designed zinc coating technology allows for achieving protective and decorative effects that are especially recommended when high durability of the coating is not required.

In order to increase corrosion protection, zinc coatings are conversion chromated (passivated). Conversion chromating also allows for achieving protective and decorative effects that are especially in cases where high abrasion durability of the coating is not required. For our products, we use a white, yellow and black coating.

Considering the colour of the obtained chromate coatings, it has to be stated that golden-yellow coatings exhibit significantly higher corrosion resistance than clear, colourless coatings.

Chromate coatings have relatively low abrasion resistance. This is especially true for thicker, black coatings. After drying, the abrasion resistance increases. Least susceptible to abrasion are colourless and white coatings.

Electrolytic nickel coatings are used in engineering for decorative and protective purposes and as technical coatings. For our products, we use decorative and protective coatings which provide optimal protection against corrosion and high aesthetic qualities.

Nickel coatings are used for fasteners are characterised by high resistance to atmospheric corrosion. We offer two types of coatings: – matte for components like euro screws (screws for furniture fittings), – glossy for components like hinges, furniture joints.

Brasses are copper and zinc alloys. The properties of electrolytic brass-plated coatings vary, depending on the content of the main alloying element, which is zinc. The chemical composition of the coating has also a determining influence on its colour, which varies from red (high copper content) to different shades of gold-yellow. The standard type of brass-plated coatings is yellow.

They are characterised by high aesthetic qualities and protect against corrosion. The anti-corrosion properties of brass-plated coatings allow for use in slightly damaging environments. Years-long analysis of the properties and applications of brass-plated coatings have shown their high rated use in products like ERICSSON nuts.

Standard phosphate coatings on the fixing elements are mat of dark gray to black colour. Typical phosphate coatings on fasteners are matte, with colours ranging from dark grey to black. Phosphate coatings have anti-corrosion properties and additionally increase the adhesion of applied paint coatings. Phosphating is performed for drywall screws (coarse and fine thread, self-drilling).

The specific use of these products excludes the use of zinc coatings which are easily damaged by contact with gypsum. Phosphate coatings not only protect products against corrosion but also reduce friction coefficient and make installation easier.

Bluing belongs to the group of conversion oxide coatings on steel. These coatings are made of iron oxides. Both the coating structure and its anti-corrosive properties vary, depending on its thickness. The optimal thickness is 0.6 – 0.8 pm. Blued coating optimally combines corrosion resistance in low corrosive conditions with mechanical resistance to, for example, abrasion.

Using them with additional grease protection significantly improves the corrosion resistance of coating and can even improve its durability. Bluing is used for products subject to heat and thermo-chemical treatment. In contrast to galvanisation, it does not reduce mechanical parameters of the top layer. This is particularly important for products with higher mechanical properties.