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PHONE HOTLINE: 800-346-4296 E-MAIL: sales@hayn.com
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PHONE HOTLINE: 800-346-4296 E-MAIL: sales@hayn.com
Contact Us
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Hayn Threaded Forks

Hayn Threaded Forks are Type 316 stainless steel clevis fork turnbuckle ends available in right and left hand thread configurations across 11 thread sizes from 1/4-28 through 1-3/8-12, providing a direct pin connection at the turnbuckle end for standing rigging and architectural cable assemblies. 

Strong Where It Matters

Threaded Fork

The threaded fork threads into a turnbuckle body and connects via pin to toggles, chainplate fittings, and other clevis-style hardware, making it the standard choice where a fixed jaw connection at the turnbuckle end is the correct geometry for the installation. Right and left hand versions are stocked across the full range, with retaining pin sizes from 1/16" through 1/4" and hardware factors from 7/8" through 4-7/8" covering thread sizes from 1/4-28 through 1-3/8-12. Hardware factor dimensions are published for all configurations to simplify total assembly length calculations during design and replacement. 
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threaded fork

Threaded Forks

Left Hand Part # Right Hand Part # P-Thread D-Pin ⌀ T-Thread Length A-Jaw Depth E-Jaw Gap F-Fork ⌀ H-Hardware Factor R-Retaining Pin Weight lbs.
TF14LH TF14RH 1/4-28 1/4″ 2 1/4″ 3/8″ 1/4″ 9/16″ 7/8″ 1/16″ 0.06
TF516LH TF516RH 5/16-24 5/16″ 2 1/2″ 7/16″ 5/16″ 23/32″ 1 1/4″ 3/32″ 0.12
TF38LH TF38RH 3/8-24 3/8″ 2 7/8″ 9/16″ 3/8″ 7/8″ 1 7/16″ 3/32″ 0.21
TF12LH TF12RH 1/2-20 1/2″ 3 1/4″ 11/16″ 1/2″ 1 1/8″ 1 13/16″ 1/8″ 0.46
TF58LH TF58RH 5/8-18 5/8″ 4″ 15/16″ 5/8″ 1 1/2″ 2 1/8″ 5/32″ 1.02
TF34LH TF34RH 3/4-16 3/4″ 5″ 1″ 3/4″ 1 7/8″ 2 7/16″ 3/16″ 1.92
TF78LH TF78RH 7/8-14 7/8″ 6″ 1 5/16″ 7/8″ 2 1/8″ 2 3/4″ 3/16″ 2.79
TF1LH TF1RH 1-12 1″ 6 7/8″ 1 15/32″ 1″ 2 1/2″ 3 5/16″ 3/16″ 3.85
TF118LH TF118RH 1 1/8-12 1 1/8″ 7″ 1 3/4″ 1 1/8″ 2 3/4″ 4 1/8″ 1/4″ 6.50
TF114LH TF114RH 1 1/4-12 1 1/4″ 7 7/8″ 1 15/16″ 1 1/4″ 3″ 4 3/8″ 1/4″ 8.11
TF138LH TF138RH 1 3/8-12 1 3/8″ 8 5/8″ 2 1/8″ 1 3/8″ 3 1/4″ 4 7/8″ 1/4″ 10.56
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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