The Stainless Steel D Shackle (commonly referred to in the rigging industry as a Dee Shackle or “Chain Shackle”) is the fundamental connecting link for joining ropes, chains, and straps. Distinguished by its narrow “D” shape, the Stainless Steel D Shackle is engineered specifically for “in-line” tension, making it the superior choice for connecting two components that pull in a straight line, such as halyards on a sailboat or suspension cables in architecture.
Product Overview: Forged from high-tensile Stainless Steel A4 (316) or standard A2 (304), our shackles feature a robust Screw Pin mechanism. The pin allows for rapid connection and disconnection without tools, while the polished finish provides maximum resistance to saltwater corrosion and aesthetic appeal.
Stainless Steel D Shackle Specifications
| Product Name | D Shackle / Dee Shackle / Chain Shackle |
| Standard | DIN 825 (Commercial) / US Fed Spec RR-C-271 (Heavy Duty) |
| Material Grade | Stainless Steel A4 (316) (Marine) / A2 (304) |
| Pin Type | Screw Pin (with hole for mousing wire) |
| Shape | Straight “D” Shape (Narrow Body) |
Engineering Insight: D Shackle vs. Bow Shackle
Choosing the correct shackle shape is a matter of safety:
- D Shackle (This Product): Designed for In-Line Loading. Because the sides are straight, it is strongest when the load pulls straight up and down. If you pull it sideways (side-loading), the straight legs can twist and fail.
- Bow Shackle (Omega Shape): Designed for Multi-Directional Loading. The rounded “O” shape allows the load to shift angles without reducing capacity. Use a Bow Shackle if you have multiple straps on one hook.
For more details on rigging hardware types, please refer to the Shackle entry on Wikipedia.
The “Screw Pin” Advantage
Our Stainless Steel D Shackle uses a screw pin, which is ideal for “Pick and Place” applications where shackles are frequently moved. The pin features a small hole in the flat tab. This is for “Mousing,” a safety technique where you thread a piece of wire through the hole and around the shackle body to mechanically prevent the pin from vibrating loose.
Frequently Asked Questions (FAQ)
Q: Can I use this for overhead lifting?
A: Only if the shackle is stamped with a WLL (Working Load Limit) and CE mark. Our commercial-grade DIN 825 shackles are for static loads (architectural, marine rigging). For cranes, please request our “Rated Lifting Shackles.”
Q: Will A4 stainless rust?
A: A4 (316) is marine-grade and is virtually immune to rust in saltwater conditions. A2 (304) may develop minor surface tea-staining if left in the ocean but remains structurally sound.
Need Marine Rigging Supplies?
Handan Bolt stocks a complete range of Stainless Steel D Shackles from 4mm up to 25mm. We supply boat builders and architectural firms worldwide.
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