Twist Shackles – Hayn Marine
Hayn Marine Hi-Mod Twist Shackles — Marine Rigging Alignment Made Easy
Hayn Marine Hi-Mod Twist Shackles are designed specifically for marine rigging applications where hardware must connect across different planes without introducing twist, side load, or unnecessary stress into sails, lines, or fittings. Featuring a 90-degree twist between the shackle body and pin, these shackles allow connections to remain properly aligned even when attachment points are oriented at right angles.
On a sailboat, hardware rarely lines up in a perfect straight line. Halyards, blocks, sails, and deck fittings often pull from different directions, and using a standard D shackle in these situations can force gear to twist under load. Over time, that twisting force can create friction, uneven wear, or hardware misalignment. A twist shackle solves this problem by naturally orienting each connection point in its proper direction, reducing strain and improving overall rigging performance.
Manufactured from high-strength marine-grade stainless steel, Hayn Marine shackles are built for demanding offshore environments. Precision machining and polishing provide smooth pin engagement and excellent corrosion resistance, ensuring dependable performance in saltwater conditions. These shackles are trusted by professional riggers and serious cruising and racing sailors alike for both standing and running rigging installations.
Twist shackles are commonly used in several areas aboard sailboats. One frequent application is attaching halyards to sail heads, where the halyard exits in one direction while the sail must orient differently. They are also ideal for connecting blocks, clew boards, or hardware where sheets or control lines change direction. Anywhere hardware must articulate cleanly without twisting lines or fittings, a twist shackle offers a clean, efficient solution.
Hayn Marine Twist Shackles are available with multiple pin options to suit different installation needs. Standard screw pins allow for easy installation and removal when hardware is serviced frequently. Socket head pins provide a cleaner profile and improved security where snagging or vibration may be a concern. Shake-proof pins offer additional resistance to loosening in applications subject to repeated movement or dynamic loads. Offering multiple pin styles allows sailors to match the shackle to the demands of the installation without sacrificing strength or reliability.
Choosing the correct twist shackle improves both performance and longevity of rigging systems. By maintaining proper alignment, loads are distributed correctly, friction is reduced, and sails and hardware operate more smoothly. This small hardware upgrade can significantly improve sail handling while helping prevent premature wear in critical rigging components.
Whether upgrading deck hardware, installing new sails, or refining rigging geometry for better performance, Hayn Marine Hi-Mod Twist Shackles provide a durable, corrosion-resistant, and professionally trusted solution. Their thoughtful design and marine-grade construction make them an essential piece of hardware for sailors seeking dependable connections throughout their boat’s rigging system.
Key Features
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90° twist aligns hardware without side loading
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High-strength marine-grade stainless steel construction
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Ideal for halyards, sail attachments, blocks, and deck hardware
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Available with standard, socket head, or shake-proof pins
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Precision machined for smooth installation and removal
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Excellent corrosion resistance for offshore environments
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Trusted by professional riggers and sailors worldwide
| with Standard Screw Pin | Dim (P) | Dim (B) | Jaw (J) | Inside (I) | M.B.L. (lbs) | Weight (lbs) | Part # |
| 4mm Twist Shackle | 0.16 | 0.16 | 0.31 | 0.51 | 1320 | 0.02 … | HM-T04 |
| 3/16 Twist Shackle | 0.20 | 0.20 | 0.39 | 0.63 | 2640 | 0.03 … | HM-T05 |
| 1/4 Twist Shackle | 0.24 | 0.24 | 0.51 | 0.79 | 3520 | 0.05 … | HM-T06 |
| 5/16 Twist Shackle | 0.31 | 0.31 | 0.63 | 1.02 | 5280 | 0.12 … | HM-T08 |
| 3/8 Twist Shackle | 0.37 | 0.37 | 0.75 | 1.22 | 8360 | 0.21 … | HM-T10 |
| 7/16 Twist Shackle | 0.43 | 0.43 | 0.87 | 1.38 | 10560 | 0.33 … | HM-T11 |
| 1/2 Twist Shackle | 0.50 | 0.50 | 1.02 | 1.61 | 13200 | 0.52 … | HM-T12 |
| 9/16 x 5/8 Twist Shackle | 0.63 | 0.56 | 1.14 | 1.77 | 17600 | 0.99 … | HM-T16 |
| 5/8 x 3/4 Twist Shackle | 0.75 | 0.63 | 1.26 | 2.01 | 24200 | 1.29 … | HM-T19 |
| … | |||||||
| with Socket Head Pin | … | ||||||
| 5mm Socket Pin Twist Shackle | 0.20 | 0.20 | 0.39 | 0.63 | 2640 | 0.03 … | HM-T05C |
| 6mm Socket Pin Twist Shackle | 0.24 | 0.24 | 0.51 | 0.79 | 3520 | 0.05 … | HM-T06C |
| 8mm Socket Pin Twist Shackle | 0.31 | 0.31 | 0.63 | 1.02 | 5280 | 0.12 … | HM-T08C |
| 10mm Socket Pin Twist Shackle | 0.37 | 0.37 | 0.75 | 1.22 | 8360 | 0.21 … | HM-T10C |
| 11mm Socket Pin Twist Shackle | 0.43 | 0.43 | 0.87 | 1.38 | 10560 | 0.33 … | HM-T11C |
| 12mm Socket Pin Twist Shackle | 0.50 | 0.50 | 1.02 | 1.61 | 13200 | 0.52 … | HM-T12C |
| 16mm Socket Pin Twist Shackle | 0.63 | 0.56 | 1.14 | 1.77 | 17600 | 0.99 … | HM-T16C |
| 19mm Socket Pin Twist Shackle | 0.75 | 0.63 | 1.26 | 2.01 | 24200 | 1.29 … | HM-T19C |
| … | |||||||
| with Shake Proof Pins | … | ||||||
| 3/16 Shake Proof Twist Retained | 0.20 | 0.20 | 0.39 | 0.63 | 2640 | 0.03 … | HM-T05RS |
| 1/4 Shake Proof Twist Retained | 0.24 | 0.24 | 0.51 | 0.79 | 3520 | 0.05 … | HM-T06RS |
| 5/16 Shake Proof Twist Retained | 0.31 | 0.31 | 0.63 | 1.02 | 5280 | 0.12 … | HM-T08RS |
| 3/8 Shake Proof Twist Retained | 0.37 | 0.37 | 0.75 | 1.22 | 8360 | 0.21 … | HM-T10RS |
| 7/16 Shake Proof T Retained | 0.43 | 0.43 | 0.87 | 1.38 | 10560 | 0.33 … | HM-T11RS |
| 1/2 Shake Proof Twist Retained | 0.50 | 0.50 | 1.02 | 1.61 | 13200 | 0.52 … | HM-T12RS |
| 5/8 Shake Proof Twist Retained | 0.63 | 0.56 | 1.14 | 1.77 | 17600 | 0.99 … | HM-T16RS |