A forelock mooring shackle is a specialized type of shackle, commonly used in marine applications, particularly for connecting anchor chains or mooring lines. It's characterized by a unique locking mechanism, a forelock, that secures the shackle's pin, preventing accidental disconnections. This design is crucial in environments where frequent maintenance or inspection is difficult or impractical.
SMEOCEAN offers Grade 2 ,Grade 3 and 304,316 stainless steel, with sizes ranging from 12.5mm to 52mm. Cotter pins are available in 304 and 316 stainless steel. Technical inquiries are welcome.
Forelock Shackle Mooring Shackle Diagram:

Specification Of Forelock Shackle Mooring Shackle:
| Nominal Dia. | D | d | d1 | S | E | W | Proof Load | Break Load | Weight |
| Anchor Chain (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | (KN) | (KN) | (kg) |
| 12.5 | 18 |
|
|
|
|
|
|
| 1.1 |
| 14 | 20 |
|
|
|
|
|
|
| 1.4 |
16
| 22 |
|
|
|
|
|
|
| 1.65 |
| 17.5 | 24 |
|
|
|
|
|
|
| 2.2 |
| 19 | 26
| 34 | 26 | 100 | 62
| 50 | 178 | 242 | 2.9 |
| 20.5 | 29 | 36 | 28 | 102 | 65 | 51 | 189 | 261 | 3.5 |
| 22 | 31 | 39 | 31 | 104 | 68 | 53 | 200 | 280 | 4.3 |
| 24 | 34 | 43 | 34 | 114 | 74 | 57 | 237 | 332 | 5.5 |
| 26 | 37 | 46 | 37 | 123 | 81 | 61 | 278 | 389 | 7.2 |
| 28 | 39 | 51 | 39 | 132 | 87 | 68 | 321 | 449 | 8.8 |
| 30 | 42 | 54 | 42 | 142 | 93 | 72 | 368 | 514 | 10.9 |
| 32 | 45 | 57 | 45 | 151 | 99 | 76 | 417 | 583 | 12.3 |
| 34 | 48 | 62 | 48 | 160 | 105 | 80 | 468 | 655 | 15 |
| 36 | 50 | 65 | 50 | 170 | 112 | 87 | 523 | 732 | 18 |
| 38 | 53 | 69 | 53 | 180 | 118 | 92 | 581 | 812 | 21.2 |
| 40 | 56 | 72 | 56 | 189 | 124 | 96 | 640 | 895 | 24.6 |
| 42 |
|
|
|
|
|
|
|
| 28.8 |
44
|
|
|
|
|
|
|
|
| 33.5 |
| 46 |
|
|
|
|
|
|
|
| 37 |
| 48 |
|
|
|
|
|
|
|
| 43.6 |
| 50 |
|
|
|
|
|
|
|
| 48 |
| 52 |
|
|
|
|
|
|
|
| 52.8 |
Questions and Answers:
What is a Forelock Shackle?
How to Choose a Forelock Shackle