The Smarter Alternative to Traditional Screw Pin Shackles

In the demanding environments of New Zealand’s marine industry, European heavy lifting, and US infrastructure projects, equipment failure is not an option. The Butterfly Shackle (commonly known as the Hammer Lock Shackle) represents a paradigm shift from standard G80 hardware. Designed for high-intensity applications, this "Hammerlock Butterfly" link offers a seamless, streamlined connection that outperforms traditional shackles in both strength and longevity.

Unlike screw-pin shackles that protrude and snag, the Alloy Steel Hammer Lock provides a clean, unobstructed profile. Whether you are securing an anchor chain in the Cook Strait, rigging a crane in Frankfurt, or setting up a tow line in Texas, this is the Grade 80 rigging hardware you can trust when the load is critical.

Product Features & Differentiators

• Zero Snag Profile (The "Butterfly" Design): Standard shackles have protruding pins that catch on bow rollers, fairleads, and deck equipment. Our butterfly hammer lock sits completely flush. This is a game-changer for yachting and towing, preventing "locking up" in the shank slot of your anchor.

• G80 Alloy Steel Construction: Manufactured from heat-treated alloy steel, this component meets the stringent standards of Grade 80 lifting chain. It provides a higher tensile strength than standard Grade 30 or 43 hardware, ensuring compliance with OSHA and ASME safety standards in the US and EU.

• Hammer Lock Activation: No specialized tools? No problem. This Hammerlock shackle is installed by simply hammering the wedge pin into the body. This creates a mechanical lock that is often more reliable than a traditional pin that can unscrew under vibration—a common issue in European automotive transport and heavy machinery.

• Corrosion-Ready for Kiwi & Coastal Conditions: (Differentiation Point) Unlike standard painted Chinese hardware that rusts instantly, this unit is available in hot-dip galvanized or e-coat finishes specifically tested for saltwater intrusion in New Zealand and the North Sea.

Technical Specifications & Parameters

*Note: Sizes 6mm to 10mm are ideal for marine anchor chains; sizes 12mm+ are for heavy industrial rigging.*

Why Upgrade to the Hammer Lock?

Safety: The hammer-on wedge cannot loosen due to cyclic loading.
Efficiency: The streamlined shape slides smoothly over winches and through chain stoppers.
Value: While a standard shackle is cheap, a failed shackle costs downtime. For professionals in the USA, UK, Germany, and NZ, the reliability of G80 alloy is non-negotiable.

Request a Quote for Bulk or OEM Orders

Upgrade your rigging inventory today. Whether you are supplying fishing fleets in Auckland or construction crews in Chicago, this butterfly hammerlock ensures your connection is the strongest part of the chain.