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Shackles

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Shackle Selection — Quick Reference (AS 2741)

Shackles — KEY rigging connecting hardware. Bow shackle (rotating loads, multi-leg slings) + Dee shackle (in-line loads). Workshop + crane + lifting + mining + marine. AS 2741 governs + WLL stamping mandatory.

Shackle Type Best For
Bow Shackle (Wider Throat) Multi-leg slings + see bow shackle guide
Dee Shackle (Narrower Throat) In-line tension loads
Screw Pin Standard workshop — manual install
Bolt + Nut + Cotter Pin Permanent / long-term installs
Grade S (Carbon) Standard rigging
Grade T (Alloy) Higher WLL + heavier rigging
Galvanised Outdoor standard
Stainless Steel Marine + corrosion + chemical

Critical: Match WLL to load + always have spare. AS 2741 + AS 1418 + AS 4991 compliance. Inspect for cracks + deformation + thread damage — tag out damaged. Brands: Austlift. Companion: lifting shackles, lifting equipment, rigging slings, lifting hooks.

Lifting Shackles: Grade S Screw Pin and Safety Pin Dee and Bow Shackles

Shackles are the fundamental connecting hardware in any rigging system — linking slings, chains, and hooks into complete lifting configurations. AIMS Industrial stocks lifting shackles from Austlift and Beaver — covering Grade S screw pin dee shackles, screw pin bow (anchor) shackles, safety pin bow shackles, and Grade M black dee shackles in electrogalvanised, hot dip galvanised, and 316 stainless steel finishes.

The AIMS Shackles Range

Our shackles range is built around Austlift and Beaver — two of Australia’s most trusted rigging hardware brands — covering the dee and bow shackle types and grades required for Australian construction, mining, and marine rigging operations.

  • Austlift Blue Grade S Screw Pin Dee Shackles: Austlift Grade S (high tensile alloy steel) screw pin dee shackles in electrogalvanised finish are the standard sling-to-load connection for general lifting rigging. The dee profile provides a narrow, inline load path and is used where the load is applied in a single direction along the shackle axis. Blue painted for Grade S identification per AS 3775.
  • Austlift Blue Grade S Screw Pin Bow (Anchor) Shackles: Austlift Grade S screw pin bow shackles are used where multiple sling legs must be connected to a single anchor point, or where the load direction changes during the lift. The bow provides a wider bearing surface for multi-leg sling configurations.
  • Austlift Safety Pin Bow Shackles: Austlift safety pin (bolt, nut, and cotter) bow shackles are for applications where the shackle pin may be subject to rotation during the lift — preventing the screw pin from unscrewing under load vibration or sling movement. Required for dynamic lifting, overhead travel, and applications where pin security cannot be verified after connection.
  • Beaver Screw Pin Dee Shackles: Beaver screw pin dee shackles in electrogalvanised and hot dip galvanised finish (5mm–25mm) provide the same Grade S performance in a Beaver-branded option. Hot dip galvanised offers superior corrosion protection for outdoor, marine, and long-term outdoor storage applications compared to electrogalvanised.
  • 316 Stainless Steel Shackles: Standard dee and bow shackles in 316 stainless steel for permanent marine, coastal, and chemical environment rigging applications where galvanised carbon steel would corrode and lose its WLL marking.

Shackle Selection and Safe Use

  • Dee vs Bow: Use a dee shackle where the load is applied in one direction (e.g. connecting a single sling leg to a hook). Use a bow shackle where multiple legs converge at the shackle (e.g. master link replacement) or where the load direction changes during the lift.
  • Screw Pin Security: Always screw the pin fully home and back off half a turn before use. Mouse (wire) the pin for applications where vibration or movement could unscrew it — or use a safety pin shackle for permanent overhead applications.

Expert Support: Need help selecting the correct shackle size, grade, and finish for your lift? Contact our team or request a quote for rigging hardware specification.

Australian Business, Local Supply: As a proudly Australian business since 1988, we stock locally and work with trusted local Australian manufacturers and distributors to ensure fast, reliable supply.

Complete your rigging system with lifting equipment, rigging and lifting slings, hooks, chain blocks, Swivels and turnbuckles.

People Also Ask — Shackles

Q: How do I match a shackle size to the sling or chain it's connecting to?

Shackle size should be selected against the sling or chain's WLL and pin bearing diameter, not chosen by eye — an undersized shackle can point-load or pinch the sling under tension, while an oversized shackle lets the sling shift sideways and reduces the effective working angle. As a rule, match the shackle's WLL to or above the sling or chain's WLL, and check the pin diameter clears the sling eye without excessive play. Manufacturer shackle-to-sling sizing charts take the guesswork out of it.

Q: What's the difference between a screw pin shackle and a bolt-type shackle?

Screw pin shackles use a threaded pin that's hand-tightened for quick, temporary rigging — standard for everyday workshop and site use where the shackle is regularly connected and disconnected. Bolt-type shackles use a bolt, nut and cotter pin, which can't work loose from vibration or repeated cycling, making them the choice for permanent or long-term installations where the shackle stays in place.

Q: What does the WLL stamp on a shackle mean, and why does it matter?

Every shackle compliant with AS 2741 is stamped with its Working Load Limit (WLL) — the maximum load it's rated to lift safely, including a built-in safety factor. Matching the WLL to the actual load, not exceeding it, is a legal requirement under AS 1418 and AS 4991 lifting equipment rules. A shackle with a worn, painted-over, or missing WLL stamp should be tagged out and taken out of service.

Q: Should I choose galvanised or stainless steel shackles?

Galvanised (electrogalvanised or hot dip galvanised) shackles are the standard choice for general outdoor rigging, construction, and mining use — the zinc coating protects against everyday weather and handling. 316 stainless steel shackles are worth the extra cost in marine environments, chemical exposure, or food-contact applications where a galvanised coating would corrode or where corrosion products can't be tolerated.

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