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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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Architectural Turnbuckle Fork System

The Hayn Architectural Turnbuckle Fork System is a concealed thread cable rail tensioning assembly that combines a turnbuckle body with a swage fork terminal and Universal Wall Eye, available in both factory-assembled machine swage and field-installed Hayn Grip configurations across wire sizes from 1/8" through 1/4" imperial and 3mm through 6mm metric. 

Strong Where It Matters

Architectural Turnbuckle Fork System

Unlike the Tensioner Fork System which requires cable rotation for tensioning, the Turnbuckle Fork System tensions through the turnbuckle body itself — making it the more installer-friendly option for runs where rotating the cable is impractical. Available in 12 machine swage configurations factory assembled to field dimensions, and 10 Hayn Grip configurations for on-site installation, covering thread sizes of 1/4-28 and 5/16-24 with a 1-1/2" adjustment range and a 40-foot maximum run length per span. Longer runs are achievable with Intermediate Turnbuckle Assemblies, and the Universal Wall Eye and Accessories table covers all standard mounting scenarios for wood, steel, and concrete structures. 
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Tensioner_Turnbuckle-Fork-with_Eye-1

Machine Swage – Factory Assembled to Field Dimensions

Part # Thread Size Wire Size Adjustment Range Max. Run Length
14TTB18FS 1/4-28 1/8″ 1-1/2″ 40′
14TTBM03FS 1/4-28 3mm 1-1/2″ 40′
14TTB532FS 1/4-28 5/32″ 1-1/2″ 40′
14TTBM04FS 1/4-28 4mm 1-1/2″ 40′
516TTB532FS 5/16-24 5/32″ 1-1/2″ 40′
516TTBM04FS 5/16-24 4mm 1-1/2″ 40′
14TTB316FS 1/4-28 3/16″ 1-1/2″ 40′
14TTBM05FS 1/4-28 5mm 1-1/2″ 40′
516TTB316FS 5/16-24 3/16″ 1-1/2″ 40′
516TTBM05FS 5/16-24 5mm 1-1/2″ 40′
516TTB14FS 5/16-24 1/4″ 1-1/2″ 40′
516TTBM06FS 5/16-24 6mm 1-1/2″ 40′

System is engineered for use with Universal Wall Eye. Longer runs are achieved with Intermediate Turnbuckle Assemblies.

Hayn Grip™ – On Site Install

Part # Thread Size Wire Size Adjustment Range Max. Run Length
14TTB18FHG 1/4-28 1/8″ 1-1/2″ 40′
14TTBM03FHG 1/4-28 3mm 1-1/2″ 40′
14TTB532FHG 1/4-28 5/32″ 1-1/2″ 40′
14TTBM04FHG 1/4-28 4mm 1-1/2″ 40′
516TTB532FHG 5/16-24 5/32″ 1-1/2″ 40′
516TTBM04FHG 5/16-24 4mm 1-1/2″ 40′
14TTB316FHG 1/4-28 3/16″ 1-1/2″ 40′
14TTBM05FHG 1/4-28 5mm 1-1/2″ 40′
516TTB316FHG 5/16-24 3/16″ 1-1/2″ 40′
516TTBM05FHG 5/16-24 5mm 1-1/2″ 40′

Universal Wall Eye and Accessories

Part # Description
AWE14-1420RH Threaded Wall Eye – 1/4″ Hole x 1/4-20 Thread
AWE516-3816RH Threaded Wall Eye – 5/16″ Hole x 3/8-16 Thread
AFP34-1420RH Wall Eye Cover Plate – 3/4″ Diameter x 1/4-20 RH Thread
AFP34-1428RH Wall Eye Cover Plate – 3/4″ Diameter x 1/4-28 RH Thread
AFP34-1428LH Wall Eye Cover Plate – 3/4″ Diameter x 1/4-28 LH Thread
AFP1-3816RH Wall Eye Cover Plate – 1.0″ Diameter x 3/8-16 RH Thread
AWI1420RH Architectural Wood Insert – 1/4-20 Right Hand Thread
AWI1428RH Architectural Wood Insert – 1/4-28 Right Hand Thread
AWI1428LH Architectural Wood Insert – 1/4-28 Left Hand Thread
DIA-14 Drop-In Anchor for Concrete – 1/4-20 Thread
DIA-38 Drop-In Anchor for Concrete – 3/8-16 Thread
14LNRC Hex Nut – 1/4-20 Right Hand Thread
38LNRC Hex Nut – 3/8-16 Right Hand Thread
14WAS Flat Washer – 1/4″
38WAS Flat Washer – 3/8″
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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