Stainless Steel Long D Shackle with Key Pin Specifications:

MOQ	1 Pallet, 1 Ton or 3000USD
Material	Grade: 316 or 17-4 PH Stainless Steel
Surface Finish	High Polished Finish
Sizes	From 3/16″ to 5/16″
Technique Procedure	Free Forging

Stainless Steel Long D Shackle with Key Pin Sizes：

What is a Stainless Steel Long D Shackle with a Key Pin?

A Stainless Steel Long D Shackle with a Key Pin is a strong, corrosion-resistant connector. The “D” shape handles in-line loads well. The key pin, a bolt secured by a cotter pin, offers maximum security for long-term or critical lifting operations, preventing accidental loosening.

Why is Stainless Steel the Best Material for These Shackles?

Stainless steel is perfect for shackles because it resists rust and corrosion exceptionally well. This makes it ideal for marine use or harsh chemical environments. Its strength and durability ensure a long service life with very little maintenance, making it a reliable and cost-effective choice.

Key Benefits of Stainless Steel

The material’s properties directly impact performance.

• Corrosion Resistance: Stainless steel naturally resists corrosion. This is critical in marine or outdoor applications where moisture is constant. You don’t have to worry about the shackle weakening from the inside out.
• Strength: These shackles are incredibly strong and can handle heavy loads without bending or breaking. We use materials such as AISI 304 and AISI 316 to ensure this strength.
• Durability: A stainless steel shackle will last much longer than a standard carbon steel one, especially in harsh conditions. This means you replace them less often, saving money over time. It’s a wise investment in safety and operational efficiency.

How Does the “Long D” Shape Affect iItsUse in Lifting?

A Long D shackle has a longer internal space than a standard D shackle. This design is ideal for connecting to multiple lifting points. It provides more room to attach slings or hardware, offering greater versatility for specific rigging jobs where a standard shape is too restrictive.

The “D” shackle, also known as a chain shackle, is designed for in-line tension. The straight sides take the load very efficiently without twisting. The “long” variation extends those consecutive sides. I often explain this to customers by comparing it to needing a bigger key ring for more keys. Sometimes, you need more space.

When to Choose a Long D Shackle

Here is a simple table to help you decide.

Situation	Standard D Shackle	Long D Shackle
Connection Point	Single sling eye, narrow anchor.	Multiple sling eyes, thick plate.
Load Type	Best for single, in-line pulls.	Good for in-line pulls, allows more room.
Clearance	Less internal clearance.	More internal clearance.

This added length provides flexibility. However, you must never forget that D shackles are not designed for side loading. The load must always be pulled straight through the center line, from the pin to the top of the bow.

What Makes the Key Pin a Secure Choice for Rigging?

A key pin, a bolt-style pin secured with a cotter pin (or split pin), provides superior security. It cannot unscrew from vibrations. This makes it the best choice for permanent or long-term installations, or any lift where the load might rotate or shake.

Pin Security Comparison

Let’s look at the differences.

• Screw Pin: This pin screws directly into the shackle ear. It’s fast and easy for temporary jobs. However, it can loosen with movement. You must check it before every lift.
• Key Pin (Bolt Type): This system uses a bolt that goes through both shackle ears. A nut is tightened on one end, and a cotter pin is inserted through a hole in the bolt’s end. This cotter pin physically stops the nut from backing off. It’s the gold standard for applications where safety cannot be compromised. It’s perfect for semi-permanent connections or dynamic loads.