Established in 1911, Unbrako is the ultimate authority in high tensile industrial fasteners and remains the socket screw by which all others are measured. The NABL ISO/IEC 17025 certified lab facilitates in maintaining consistent high quality. Strict quality checks are done at every stage to meet the needs of most demanding industries.
A variety of coatings are done in-house: Hot Dip Galvanizing, Mechanical Galvanizing, Zinc / Zinc- Nickel Electroplating, PTFE, Geomet, Delta Dorken and Unbrako Wiscoat, among others. Unbrako tensile specifications are 10,000 psi higher than industry standard - while maintaining the core hardness range.
A variety of coatings are done in-house: Hot Dip Galvanizing, Mechanical Galvanizing, Zinc / Zinc- Nickel Electroplating, PTFE, Geomet, Delta Dorken and Unbrako Wiscoat, among others. Unbrako tensile specifications are 10,000 psi higher than industry standard - while maintaining the core hardness range.
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Unbrako
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Established in 1911, Unbrako is the world leader in advancing the technology of bolted joints and meeting the needs of industry for stronger and better performing fasteners. Unbrako products have higher tensile strength, improved fatigue resistance and extended life cycle.
The famous Unbrako socket head cap screw and the self-locking Durlok fasteners are the solutions of choice for engineering applications across the globe, and hold together the Melbourne AAMI Park, Heathrow T5, Delhi Metro, to name a few.The first development of an internal-wrenching hexagon drive of which there are records is that of circa 1911 in Pennsylvania, by the founders of Unbrako.
The famous Unbrako socket head cap screw and the self-locking Durlok fasteners are the solutions of choice for engineering applications across the globe, and hold together the Melbourne AAMI Park, Heathrow T5, Delhi Metro, to name a few.The first development of an internal-wrenching hexagon drive of which there are records is that of circa 1911 in Pennsylvania, by the founders of Unbrako.
DFL History
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Set up Unbrako LLC - office & warehouse in Los Angeles, USA, serving the American markets. Acquired the brands Unbrako, Durlok & Sel-lok from SPS Technologies, along with the Shannon (Ireland) manufacturing unit & the Melbourne (Australia) Warehouse. Shannon plant today also serves as Distribution and Engineering Support Centre.
Hot Dip Galvanizing
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Hot-dip galvanizing (HDG) is one of the oldest and most commenly used method of protecting steel fasteners from corrosion. HDG coating is relatively maintainence-free and provides excellent corrosion protection to steel structures for 50-70 years in most atmospheric environments (industrial, urban, marine & rural).
Zinc Electroplating
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Zinc Electroplating provides corrosion resistance by acting as a barrier and sacrificial coating. Because zinc is more reactive that steel, the zinc coating corrodes first, protecting the steel substrate. The rate of corrosion of zinc is atleast 10 times slower than that of steel, thus a thin coating of zinc can protect steel for long time.
Mechanical Galvanizing
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In Mechanical Galvanizing a thick coating of zinc provides sacrificial or cathodic protection to the steel fastener. Because zinc is more reactive than iron, the zinc coating "sacrifies" or corrodes first, protecting the steel substrate. The rate of corrosion of zinc is atleast 10 times slower than that of steel, thus a thin coating of zinc can protect the steel for a long time.
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