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PHONE HOTLINE: 800-346-4296 E-MAIL: sales@hayn.com
Contact Us
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High Resistance "D" Shackles

Hayn High Resistance "D" Shackles are manufactured from 17/4 PH stainless steel, delivering substantially higher breaking loads than standard 316 shackles of the same physical size for applications where strength-to-weight ratio is critical. 

Strong Where It Matters

High Resistance "D" Shackles

The 17/4 PH alloy is the key differentiator — precipitation-hardened stainless steel achieves significantly greater tensile strength than standard 316, which means these shackles can handle loads that would require a much larger conventional shackle to match. Minimum breaking loads range from 5,952 lbs on the 1/4" pin size through 61,729 lbs on the 3/4" pin size, with seven sizes available in pin diameters from 1/4" through 3/4". The standard screw pin configuration keeps the design simple and familiar for riggers working in demanding offshore and racing applications where every pound of hardware weight matters. 
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high resitance d shackles

High Resistance “D” Shackles

d shackle standard screw

Part # with Standard Screw Pin Description D-Pin ⌀ B-Body ⌀ F-Jaw Width L-Inside Length M.B.L. lbs Weight lbs.
HM-HRD06 1/4″ x 1/4″ HR D Shackle 1/4″ 1/4″ 15/32″ 25/32″ 5,952 0.05
HM-HRD08 5/16″ x 5/16″ HR D Shackle 5/16″ 5/16″ 5/8″ 1 1/32″ 9,700 0.12
HM-HRD10 3/8″ x 3/8″ HR D Shackle 3/8″ 3/8″ 25/32″ 1 9/32″ 16,535 0.21
HM-HRD12 1/2″ x 1/2″ HR D Shackle 1/2″ 1/2″ 15/16″ 1 17/32″ 22,046 0.52
HM-HRD14 9/16″ x 9/16″ HR D Shackle 9/16″ 9/16″ 1 9/32″ 2 7/32″ 30,865 0.80
HM-HRD16 5/8″ x 5/8″ HR D Shackle 5/8″ 5/8″ 1 9/32″ 2 3/4″ 41,888 1.03
HM-HRD20 3/4″ x 3/4″ HR D Shackle 3/4″ 25/32″ 1 1/2″ 2 3/4″ 61,729 1.33
Engineered In America Every Hayn fitting is designed and manufactured at our facility in Rocky Hill, Connecticut — the same American workmanship that has set the standard for stainless steel rigging hardware since 1950.
Cold-Worked Production Hayn fittings are cold-worked, not cast. That distinction matters: the cold-working process refines grain structure, increases fatigue resistance, and produces a fundamentally stronger component — one built to perform when the load comes on it.
Precision Manufacturing Our Rocky Hill production floor runs CNC vertical mills, CNC lathes, large-capacity mill-turn centers, and waterjet cutting systems — all configured to produce hardware that meets exact specifications, every time.
75+ Years of Excellence Hayn has been engineering and manufacturing marine and architectural rigging hardware since 1950. That track record isn't just history, it's the design knowledge, failure data, and continuous improvement that goes into every product we make. 
  • Type 316 stainless steel construction for superior saltwater corrosion resistance
  • Manufactured in Rocky Hill, Connecticut to Hayn's proprietary tolerances
  • Precision-machined using advanced CNC manufacturing equipment



  • Engineered for seamless integration in marine and architectural rigging systems

  • Short lead times on both standard and custom components

  • Backed by 75 years of marine and architectural hardware expertise

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Let's Build Something Together

 Hayn has been engineering precision rigging hardware since 1950. So whatever your project demands, you're building with hardware that's been proven at sea and on structure for generations. 
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