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Masterlinks & Sub-Assemblies

Keep your inventory up to scratch with our selection of Grade 100 Masterlinks and Sub-Assemblies.

Brought to you by expert manufacturer William Hackett, our masterlinks and sub-assemblies are available in a range of sizes from 1/4" - 5/8" (working load limits up to 10Tonnes) and are made from solid grade 100 alloy steel, crack detected and tested to 2.5 times the stated working load limit.

Get yours today as a means of completing your chain slings assembly or increasing your inventory - whichever, we guarantee you're buying only the best quality on the market.

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William Hackett Oblong Masterlink (Grade 100)

William Hackett Oblong Masterlink (Grade 100)

From $17.57

In Stock, Ships Today (Order Before 10:30AM CST)

William Hackett Masterlink Sub Assembly (Grade 100)

William Hackett Masterlink Sub Assembly (Grade 100)

From $40.77

In Stock, Ships Today (Order Before 10:30AM CST)

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Masterlinks & Sub-Assemblies for Chain Slings – Built for Strength and Safety

At SlingSmarter, we stock a complete range of masterlinks and masterlink sub-assemblies engineered for professional lifting and rigging applications. Whether you're assembling a chain sling or replacing a critical component, our masterlinks are designed to meet the most demanding jobsite requirements.

Looking for a top link for 1- or 2-leg chain slings? Our standard masterlinks are purpose-built for that job. Building a 3- or 4-leg sling? You’ll need a masterlink with sub-assembly, which includes welded or mechanical intermediate links for safe and balanced load distribution across multiple sling legs.

Each masterlink is forged from premium-grade alloy steel, heat-treated for superior performance, and clearly marked for traceability and load ratings. We supply both Grade 80 and Grade 100 options suitable for various chain sizes and working load requirements — all compliant with ASME B30.9.

  • Engineered for overhead lifting and rigging applications
  • Compatible with chain slings from 1/4” up to 1/2” diameter
  • Assembled and tested in Houston, TX using globally sourced components
  • Available with custom components to suit your exact build

Need help selecting the right masterlink or sub-assembly? Try our Chain Sling Builder to configure a custom lifting solution that’s safe, efficient, and made to order.

What Is a Masterlink in Lifting?

A masterlink (or “top link”) is the main attachment point between a chain sling and a lifting hook. It is responsible for bearing the total load and distributing force evenly across the sling legs. Choosing the correct size and type — especially for multi-leg chain slings — is crucial for lifting safely. We offer standard Grade 100 models or specialist DNV and 'zinc-tough' models resistant to hydrogen embrittlement.