Shackles play a critical role in lifting and rigging operations, and reading the stamping codes on them correctly is essential for safe and effective use. Whether you’re on a construction site or working in marine logistics, knowing what these markings mean helps ensure that the right hardware is being used for the right job. Reputable D shackle bow shackle manufacturers in India always stamp their products with vital information to help users make informed decisions in the field.

Why Stamping Codes Matter

Stamping codes are not just identifiers—they're your first line of safety. These marks provide critical data such as:

• Working Load Limit (WLL)

• Manufacturer identification

• Material grade

• Batch or heat number

• Size or diameter of the shackle

Using a shackle without clear and legible stamping can be risky, especially when load capacity or authenticity cannot be verified.

Breaking Down the Common Stamping Codes

Let’s take a closer look at the typical elements you’ll find on a shackle:

1. Working Load Limit (WLL)

This tells you the maximum weight the shackle can safely handle during operation. It is usually listed in tonnes (e.g., 3.25T).

2. Size or Diameter

Often stamped in millimeters or inches, this refers to the diameter of the shackle body, not the pin.

3. Grade or Material Code

This could be a number or letter indicating the grade of steel used. For example, “G-2130” refers to a particular high-strength alloy shackle.

4. Manufacturer Identification

This may be a name, logo, or specific code that identifies the shackle’s origin. Trustworthy D shackle bow shackle manufacturers in India will always include this for traceability and accountability.

5. Trace Code or Heat Number

This allows the manufacturer to trace the batch or production run of the shackle—important for quality control and recalls if necessary.

How to Verify a Shackle Using Its Stamp

1. Cross-check with documentation – Match the stamp info with the product certificate or load chart.

2. Inspect visibility – If markings are faded or unclear, the shackle should be replaced.

3. Avoid unmarked shackles – Never use shackles without legible stamping, especially in critical applications.

Tips for Safe Use

• Always use shackles within their WLL.

• Avoid side loading unless the shackle is designed for it.

• Store shackles in dry environments to preserve marking visibility and prevent corrosion.

• Regularly inspect all lifting hardware, especially before heavy operations.

Conclusion

Reading and understanding shackle stamping codes is a simple yet powerful way to maintain safety and efficiency on the job. By familiarizing yourself with the markings and sourcing hardware from reliable D shackle bow shackle manufacturers in India, you ensure not only compliance but peace of mind in every lift.

About SVIBO Industries

SVIBO Industries is a trusted name in the lifting and rigging industry, known for manufacturing precision-engineered D shackles and bow shackles that meet international quality and safety standards. With a commitment to durability and performance, SVIBO serves a wide range of industries across India.

For more information about SVIBO Industries,

Visit website: https://sviboindustries.in/
Address: 111,112,113 Mahatma Phule Peth, Block No 101, Sevadham Building, 1st Floor, Pune, Maharashtra 411042
Email: [email protected]