What is a shackle used for in lifting?

A shackle connects rigging components such as slings, chains, wire ropes, hooks and lifting lugs. Its removable pin allows the connection to be made and released.

What is the difference between a D shackle and a bow shackle?

A D shackle has a narrow body for straight, in-line loads. A bow shackle has a larger rounded body that accepts multiple slings and handles angled loads better, within its rated limits.

When should a bolt-type shackle be used instead of a screw pin?

Bolt-type shackles with a nut and cotter pin are preferred for long-term installations or where the load may rotate the pin, because the pin cannot unscrew.

How do I choose the right shackle size?

Choose by the required working load limit and the connection geometry, not by physical size. Confirm the rating, standard and inside dimensions needed for the sling or lug.

What should be checked before using a shackle?

Check that markings are legible and that the body and pin show no deformation, cracks, wear or damaged threads, and that the correct pin is fitted.

What details are needed for a shackle quotation?

State the shackle type, pin type, required WLL, inside dimensions, finish, marking and certificate requirements, quantity and delivery location.

Lifting & Material Handling

Shackle

Pin-connected shackles for removable links within lifting, rigging and material-handling assemblies.

Key attributes

Body forms: D (chain) or bow (anchor)
Pin types: Screw pin or bolt type
Rating: Confirmed against requirement
Supply basis: Type, rating & documents
Category: Lifting & Material Handling
Location: Mumbai, India

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Quick answer

What is a shackle?

A shackle is a U-shaped metal body closed by a removable pin, used to connect slings, chains, wire rope, hooks and lifting points. D shackles suit straight in-line loads, while bow shackles have a rounder body that accepts multiple slings or angled loads.

Also known asD shackle · Bow shackle · Anchor shackle · Rigging shackle

Key takeaways

D shackles suit in-line loads; bow shackles allow multi-leg or angled loading.
Screw-pin shackles suit temporary rigging; bolt-type for long-term or rotating loads.
Every lifting shackle must carry a confirmed working load limit.
Inspect body, pin and threads before each use.

How Shackles Work in Practice

Shackles are the removable links of a rigging system. They connect a sling to a lifting lug, a hook to a chain, or several legs to a single point, and the pin can be removed to install or dismantle the arrangement.

Choosing a shackle means choosing a body form, a pin type and a rated capacity. The rating, standard and documentation for lifting use must be confirmed against your requirement, and the shackle must be used within that rating and its loading geometry.

Shackle Body & Pin Types

D (chain) shackle

Narrow D-shaped body for single, in-line connections.

Bow (anchor) shackle

Larger rounded bow for multiple slings or side loading within limits.

Screw pin

Threaded pin for quick fitting in temporary rigging.

Bolt type (nut & cotter)

Bolt, nut and split pin for long-term or rotating-load installations.

How to Choose the Right Shackle

Working Load Limit

Select by the required rated capacity, never by size alone. Confirm WLL and the governing standard.

Loading Geometry

Side loading and multi-leg angles reduce effective capacity; bow shackles handle these better than D shackles.

Pin Security

Screw pins can loosen if the load rotates the pin; bolt-type pins with cotters suit long-term rigging.

Marking & Records

Lifting shackles should carry identification and rating marks with traceable documents.

Safety note

Lifting and load-bearing products must be selected against a confirmed working load limit, the applicable standard and the actual rigging arrangement. Never use a part beyond its marked or documented rating, and inspect before every use.

D Shackle vs Bow Shackle

Body shape decides how the shackle can be loaded.

D Shackle vs Bow Shackle
Criteria	D (chain) shackle	Bow (anchor) shackle
Body shape	Narrow D profile	Larger rounded bow
Best for	Single, in-line loads	Multiple slings or angled loads
Side loading	Not intended for side loads	Better tolerance within rated limits
Typical use	Chain and single-sling connections	Multi-leg slings, wide webbing slings

Shackle Specifications

Use this framework to prepare a complete enquiry. Values are confirmed against your drawing, application and required quantity.

Shackle specification framework
Parameter	Requirement basis
Product type	D shackle or bow shackle
Pin type	Screw pin, bolt type or round pin
Working load limit	State the required WLL
Body & pin diameter	As required
Inside width & length	To suit sling, lug or hook
Material	As specified
Finish	Painted, galvanised or as required
Marking & certificates	State marking and test-document needs

What to include in your enquiry

Shackle type and pin type
Required working load limit
Inside width/length to suit the connection
Marking, documents and quantity

Where Shackles Are Used

Typical application areas. The intended task should always be disclosed so the product form and specification can be evaluated correctly.

Crane & hoist rigging

Connecting slings, hooks and lifting points

Marine & offshore

Mooring, towing and deck rigging

Construction

Erection rigging and temporary lifting

Material handling

Removable links in handling assemblies

Have a specific application in mind? Share the load, environment and arrangement for a review.

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Lifting & Material HandlingShackle

Product features

Product type: D shackle or bow shackle
Pin type: Screw pin, bolt type or round pin
Working load limit: State the required WLL
Body & pin diameter: As required
Inside width & length: To suit sling, lug or hook
Material: As specified