Heavy Duty Alloy Steel D Shackle Galvanized For Engineering Rigging Construction

Product Specification

Heavy Duty Alloy Steel D Shackle Galvanized for Engineering Rigging, Construction & Webnet

1. Product Description

The Heavy Duty Alloy Steel D Shackle is a robust, high‑performance lifting and rigging component designed for demanding engineering rigging, construction hoisting, safety net (webnet) tensioning, and heavy machinery fixing. Manufactured from high‑strength alloy steel with a hot‑dip galvanized finish, this D‑shaped shackle offers excellent corrosion resistance, exceptional breaking load capacity, and long service life in harsh outdoor and industrial environments.

The shackle features a classic D‑shape body with a round pin and is optionally available with a safety bolt pin for added security. It complies with international standards for heavy‑duty lifting and is 100% load tested. Available in sizes from 3 mm to 32 mm, with breaking loads ranging from 400 kg to 38,000 kg (0.5T to 35T+), this shackle is fully customizable in size, packaging, logo, surface finish, and material (alloy steel or stainless steel upon request). Free samples are supported, and door‑to‑door service is available.

Ideal for engineering rigging, construction lifting, webnet systems, truck lashing, and heavy machinery anchoring, this D shackle combines strength, durability, and ease of use.

2.Product Attributes

Additional specifications:

• Material: High strength alloy steel (carbon steel with heat treatment). Stainless steel available on request.

• Surface finish: Hot‑dip galvanized (zinc coated).

• Pin type: Round pin with optional safety bolt pin (screw collar pin or nut + cotter pin).

• Working load limit (WLL): Typically 1/4 to 1/5 of breaking load (safety factor 4:1 or 5:1).

• Customization: Size, packaging, logo, surface finish, material.

• Standards: European type design, meets heavy‑duty engineering requirements.

• Samples: Free samples available.

• Delivery: Door‑to‑door service supported.

3. Key Features

• Heavy duty alloy steel construction – High tensile strength, impact resistance, and fatigue life for demanding lifting and rigging tasks.

• Hot‑dip galvanized finish – Provides superior rust and corrosion protection for outdoor, marine, and construction environments.

• D‑shape design – Optimized geometry for high load capacity, reduced weight, and easy handling. Distributes load evenly.

• Round pin with safety bolt option – Quick connection and disconnection; optional locking mechanism prevents accidental pin loosening under vibration or dynamic loads.

• High breaking load – Sizes from 3mm to 32mm with breaking loads from 400kg to 38,000kg, suitable for light to extremely heavy lifting.

• 100% load tested – Each shackle is proof‑tested to its rated breaking load, ensuring reliability and safety.

• Fully customizable – Size, packaging, logo, surface finish, and material can be tailored to customer requirements.

• Free samples and door‑to‑door service – Low MOQ for trials, convenient global logistics.

• Wide applications – Engineering rigging, construction hoisting, webnet tensioning, truck lashing, heavy machinery fixing, mining, and offshore.

4. Applications

The Heavy Duty Alloy Steel D Shackle is used in numerous demanding fields:

• Engineering rigging – Crane slings, hoist attachments, load binding, and heavy equipment lifting.

• Construction & hoisting – Steel beam lifting, concrete panel rigging, scaffolding ties, and formwork securing.

• Webnet (safety net) systems – Tensioning and connecting galvanized or stainless steel webnets for rockfall protection, animal enclosures, building facades, and fall arrest nets.

• Truck lashing & cargo securement – Tie‑down straps, container lockdown, flatbed trailer securing.

• Heavy machinery fixing – Anchoring industrial equipment, mining machinery, and conveyor systems.

• Marine & offshore – Mooring lines, anchor chains, towing bridles, and oil platform rigging.

• Mining & quarry – Chain connections, conveyor belt repairs, and safety line anchors.

5. Technical Principles

5.1 Material & Strength

The shackle is forged or precision cast from high‑strength alloy steel (typically grade 20# or 35# carbon steel with quenching and tempering). The material provides high yield strength, ductility, and resistance to shock loading. The D‑shape geometry minimizes stress concentration at the pin holes and distributes the load uniformly along the curved body.

5.2 Safety Factor

These shackles are designed with a safety factor of 4:1 or 5:1 (breaking load vs. working load limit). For example, a shackle with a breaking load of 10,000 kg has a safe working load (SWL) of approximately 2,000–2,500 kg. Users must never exceed the SWL and should consider dynamic loads, angles, and wear.

5.3 Hot‑Dip Galvanizing

The galvanized coating (typically 40‑80 µm thickness) provides sacrificial protection against corrosion. The zinc layer corrodes preferentially, protecting the steel base even if scratched. This makes the shackle suitable for prolonged outdoor exposure, saltwater splash zones, and humid construction sites.

5.4 Pin Locking Mechanism

The standard round pin allows easy insertion and removal without tools. The optional safety bolt pin (screw collar pin or nut + cotter pin) prevents the pin from rotating or backing out under vibration. For critical lifting applications, the safety bolt pin is recommended.

5.5 Load Testing & Traceability

Each shackle is proof‑loaded to 100% of its rated breaking load. Permanent markings (size, grade, and load rating) are often stamped on the body. This ensures traceability and compliance with international lifting standards (e.g., EN 13889, ASME B30.26).

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