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Long "D" Shackles

Hayn Long "D" Shackles are Type 316 stainless steel shackles with an extended inside length that provides greater jaw clearance than a standard D shackle, available in standard screw pin, socket head pin, and shake proof retained pin configurations.

Strong Where It Matters

Long "D" Shackles

The longer inside length makes these the right choice where a standard D shackle is too short to accommodate the fitting or hardware being connected, while still keeping the compact, low-profile geometry of the D shackle form factor. The shake proof retained pin configuration adds positive locking for high-vibration or offshore applications where an unsecured pin is not an option. Available in five pin sizes from 5/32" through 3/8", with minimum breaking loads from 1,320 lbs through 8,360 lbs, in standard screw pin, socket head, and shake proof retained pin configurations. 

Long D Shackle

With Standard Screw Pin

d shackle standard screw

Part # Description D-Pin ⌀ B-Body ⌀ F-Jaw Width L-Inside Length M.B.L. lbs Weight lbs.
HM-LD04 5/32″ Long D Shackle 5/32″ 5/32″ 5/16″ 15/16″ 1,320 0.03
HM-LD05 3/16″ Long D Shackle 3/16″ 3/16″ 13/32″ 1 5/32″ 2,640 0.04
HM-LD06 1/4″ Long D Shackle 1/4″ 1/4″ 17/32″ 1 11/16″ 3,520 0.07
HM-LD08 5/16″ Long D Shackle 5/16″ 5/16″ 5/8″ 1 29/32″ 5,280 0.15
HM-LD10 3/8″ Long D Shackle 3/8″ 3/8″ 3/4″ 2 3/16″ 8,360 0.26

With Socket Head Pin

d shackle socket head

Part # Description D-Pin ⌀ B-Body ⌀ F-Jaw Width L-Inside Length M.B.L. lbs Weight lbs.
HM-LD05C 3/16″ Socket Pin Long D 3/16″ 3/16″ 13/32″ 1 5/32″ 2,640 0.04
HM-LD06C 1/4″ Socket Pin Long D 1/4″ 1/4″ 17/32″ 1 11/16″ 3,520 0.07
HM-LD08C 5/16″ Socket Pin Long D 5/16″ 5/16″ 5/8″ 1 29/32″ 5,280 0.15
HM-LD10C 3/8″ Socket Pin Long D 3/8″ 3/8″ 3/4″ 2 3/16″ 8,360 0.26

With Shake Proof Pin

d shackle shake proof

Part # Description D-Pin ⌀ B-Body ⌀ F-Jaw Width L-Inside Length M.B.L. lbs Weight lbs.
HM-LD05RS 3/16″ Shake Proof Long D Retained 3/16″ 3/16″ 13/32″ 1 5/32″ 2,640 0.04
HM-LD06RS 1/4″ Shake Proof Long D Retained 1/4″ 1/4″ 17/32″ 1 11/16″ 3,520 0.07
HM-LD08RS 5/16″ Shake Proof Long D Retained 5/16″ 5/16″ 5/8″ 1 29/32″ 5,280 0.15
HM-LD10RS 3/8″ Shake Proof Long D Retained 3/8″ 3/8″ 3/4″ 2 3/16″ 8,360 0.26
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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 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.