Flat Shackle for Lifting and Rigging

Flat shackle is a specially designed lifting shackle with a flattened body structure that allows better load distribution and improved compatibility with lifting slings, wire ropes, and rigging assemblies.

Compared with standard bow shackles, flat shackles reduce pressure concentration on sling eyes and improve contact stability during heavy lifting operations.

They are typically used in high-load environments where safety, stability, and wear resistance are critical.

Flat Shackle Feature

The flat shackles (both body and pin) we produce are made of high quality alloy steel through advanced production line and intermediate frequency furnace heat treatment. It is characterized by high-intensity, good toughness, small volume, light weight, beautiful appearance and good durability.

• Production range: 55t-2,000t.
• Materials of flat shackle body and pin are processed through quenching and tempering with high-quality alloy steel.
• The minimum breaking load is 4 times of the rating working load.
• Manufacturing method of the flat shackle body: die forging combined with free forging technique.
• Both circular and hexagonal nuts are available.
• Non-destructive flaw detection is employed for every single product to ensure there is no intensity defect.
• Each flat shackle will be marked with working load.
• No need to use the thimble when the flat shackle was connected _with high-strength lifting belt, wire rope sling and large radius’s domed roof. Wear-resisting property of the wire rope sling is improved obviously.
• The flat shackle body and the pin are galvanized and then the pin paint in blue.
• Treatment: Galvanizing (include hot-dip galvanizing and electro-galvanizing) Painting.

No need to use the thimble when the shackle was connected with high-strength lifting belt, wire rope sling and large radius’s domed roof.  Wear-resisting property of the wire rope sling is improved obviously.

Flat Shackle Applications

Flat shackles are widely used in demanding lifting and rigging environments:

• Heavy construction lifting projects
• Offshore and marine engineering
• Mining and quarry equipment lifting
• Steel structure installation
• Industrial machinery hoisting
• Crane and rigging systems
• Lifting sling connection systems

Their design makes them especially suitable for applications where sling protection and stable load alignment are required.

Key Selling Points of Flat Shackles

Upgraded Material for Higher Strength

Modern flat shackles are mainly manufactured from high-strength alloy steel, replacing traditional carbon steel.
This upgrade significantly improves load capacity, durability, and fatigue resistance under heavy lifting conditions.

Multiple International Standards Available

Flat shackles are produced according to different global standards to meet various industrial requirements:

• Chinese standard flat shackles
• American standard flat shackles
• Japanese standard flat shackles

Among them, American standard shackles are widely used due to their compact structure and high load capacity.

Wide Product Range for Different Applications

Depending on usage scenarios, flat shackles can be classified into:

• Flat shackles for lifting applications
• Flat shackles for marine and ship operations
• General-purpose industrial flat shackles

Heavy-duty models with larger size and weight are often installed in fixed positions where frequent disassembly is not required.

Flexible Safety Factor Options

Safety factor is a key parameter when selecting flat shackles.

Available options include: 4:1, 5:1, 6:1, 8:1

All shackles must be used strictly within their Working Load Limit (WLL). Overloading and misuse are strictly prohibited to ensure operational safety.

Multiple Structural Types (American Standard Series)

American standard flat shackles include widely recognized models such as: G209 (BW), G210 (DW), G2130 (BX), G2150 (DX)

These models are widely used in industrial lifting systems due to their reliability and standardized design.

Material & Surface Treatment Options

To meet different working environments, flat shackles can be produced using:

Materials:

• Carbon steel
• Alloy steel
• Stainless steel
• High-strength steel

Surface Treatments:

• Hot-dip galvanizing
• Electro-galvanizing

These treatments improve corrosion resistance and extend service life in harsh environments.

Specifications

Flat Shackle
	Art.No.	WLL (t)	W (mm)	D (mm)	P (mm)	A (mm)	O (mm)	S (mm)	Self  Weight (kg)
	BK55	55	85	57	100	55	160	240	32.6
	BK85	85	110	76	130	75	200	310	78.4
	BK120	120	130	85	150	85	220	365	110.5
	BK150	150	140	95	170	90	250	390	154.8
	BK200	200	150	105	205	100	280	460	251.8
	BK300	300	185	134	265	120	350	630	451.7
	BK400	400	220	160	320	145	370	650	758.9
	BK500	500	250	180	340	160	450	700	1092.2
	BK600	600	275	200	370	170	490	760	1404.2
	BK700	700	300	215	400	190	540	780	1703.8
	BK800	800	325	230	420	200	554	850	1958.3
	BK900	900	350	255	440	220	584	900	2450
	BK1000	1000	380	270	460	240	614	900	2566.2
	BK1250	1250	430	300	530	260	644	950	3500
	BK1500	1500	460	320	560	280	680	950	4032
	BK2000	2000	500	385	600	320	680	1050	5067
	1. Working load limit: 55t~2,000t.
	2. Materials of flat shackle body and pin are processed through quenching and tempering with high-quality alloy steel.
	3. The flat shackle body and the pin are galvanized and thenthe pin paint in blue.

Explore more heavy duty shackles.

Package

JULI standard export package: Poly Bag+Pallets, Customized packaging according to customer needs.

Forging Rigging Manufacturing Base of JULI Slings

The forging rigging factory of JULI Slings is one of the largest forging rigging production bases in Asia, equipped with advanced forging, heat treatment, surface coating, and non-destructive testing systems.

With continuous investment in production technology and quality control, the facility is capable of delivering high-performance rigging products that meet international industrial lifting standards.

Advanced Forging & Production Equipment

Our production line is supported by a full range of heavy-duty forging equipment, including:

• 5T free forging hydraulic hammer
• 4,000T friction press machine
• 2,500T friction press machine
• 1,000T friction press machine
• 750kg–1000kg air forging hammers

In addition, we have independently developed large-scale bending machines, including:

• 400T bending machine
• 1,000T bending machine
• 1,500T bending machine
• 2,000T bending machine

These advanced systems ensure precision forming, stable mechanical properties, and high production efficiency.

Production Capacity

The factory has an annual production capacity of 20,000 tons, supporting large-volume orders for global distributors, OEM customers, and industrial projects.

Product Range

We specialize in a full range of forging rigging products, including:

• Flat shackles
• Large WLL shackles with circular cross-section
• Bow shackles
• D shackles
• Custom forged rigging components

Our production range covers 0.5T to 2,000T, meeting both standard and ultra-heavy lifting requirements.

Quality Control & Testing System

To ensure product reliability and safety, the factory is equipped with advanced:

• Heat treatment systems
• Surface coating lines
• Non-destructive testing (NDT) equipment

Each product undergoes strict inspection to ensure consistent mechanical performance and compliance with international safety standards.